If you find one, keep looking; you may be able to take home a few, just be careful not to take too many. JASPILITE a specimen of iron formation in which the usual red iron oxide coloring has been weathered to ochre-colored limonite. LAKE SUPERIOR AGATES Typical beach specimens. Although many conglomerate rocks are referred to as pudding stones, the most widely recognized stone in the state comprises a base rock of white quartzite, with pebbles of jasper and other dark-colored inclusions. Individual county maps showing the location of State and Federal lands available for public recreation are distributed at Department facilities throughout Michigan. Ophitic Basalt Bumps and irregular knobs of dissolved gas create small craters in ophitic basalt of varying colors and shapes. That gel will slowly crystallize to form microcrystalline quartz. Included below is a PDF you can download of places to find different fossils in Michigan. As a bonus, there are fewer of those pesky mosquitos in spring! Like the Petoskey stone, the Charlevoix stone is a remnant from the ancient period of Earth history when the land that we now call Michigan sat at the bottom of a shallow sea. About 350 million years ago, Michigan was actually located near the equator, and a warm, shallow, tropical sea covered the land. Silver has been recovered from Lake Superior on the north side of Keweenaw Point, whereas glacier copper is reported from both sides of the Point. JACOBSVILLE SANDSTONE not considered a lapidary material, but sometimes weathering processes cement the grains into a compact mass that takes a fairly good polish. Dont be afraid to wade out into the water if necessary. If you have a piece that is semi-transparent you will be able to hold a very thin piece up and see distorted or foggy images through it. This is a state-wide law, but each beach or state park will have its own policies. One of the most appealing reasons for naming the Lake Superior agate as the Minnesota state gemstone is its general availability. Note: This secluded beach can be accessed via Smugglers Tunnel. Due to the mining history that once completely consumed the Upper Peninsula, this stone is just one of the many existing outcomes of these small-town mining companies . These corals are called colonial rugose corals and lived in the Devonian Period. Slag glasses can be found in Frankfort, Cadillac, Elk Rapids, Fayette, Marquette anywhere smelting was done. Appropriate Shoes: You're most likely going to be next to . The largest copper nuggets ever found have come from this region. Rare Gems and Minerals in Wisconsin. Basalt rock comes from volcanic rock and is the base of the earths crust. Beach glasses are usually not very thick as well, being that they were made from a glass bottle or standard thickness of glass. 6. Corals were a common component of ancient life in Michigan. Use a small plastic rake or kitty litter scoop to sift through the sand. (1992, Lake Superior Port Cities, Inc.). would instead prefer to scour the shores of Lake Michigan to find original . No special training is needed for rock collecting. Frankfort Green is also relatively well known, looking much like the green of a green wine bottle. Michigan later divided its rivers into twelve underwater preserves . Vertebrate fossils are relatively rare in Michigan and can range from fragments of the plates of prehistoric armored fish preserved in Devonian rocks to nearly complete skeletons of mastodons and mammoths in the wet, sticky, marl (carbonate-rich mud) of the Pleistocene. Mac Woods Dune Rides has one of the largest displays of fulgurites, including one piece that is 9 feet long. Agate stone is made up of mainly quartz and chalcedony. 2. Lake Michigan actually had one of the largest lake trout fisheries in the world until the mid-1900s, at which point it suffered a collapse due to overfishing and invasive species. The lakeshore hugs the coast of Lake Superior - the largest and deepest of all the Great Lakes - for more than 60 kilometers and boasts hiking, camping, boating . Usually, we find pieces of the stems or their bodies. 19. While beach glass is a pretty easy concept to grasp, slag glass is from the smelting industry, and its pretty greens, blues, and purples are a fun find. Lake Superior Rocks & Minerals Field Guide. He found these glowing treasures in the sand on a Lake Superior beach near Brimley, MI. It is the fossils of these corals that make a Petoskey stone. Lighter green predominates Greenstones from Isle Royale, while many Keweenaw Greenstones are darker. Posted by 95.3 WBCK on Monday, August 3, 2020 Starting their life as a hollow volcanic rock, they soon fill with gas bubbles. If you go, good luck, and save some for the rest of us! https://www.abc57.com/news/fulgurite-is-lightnings-work-of-art, https://lakemichigandestinations.com/sand-dunes/whats-a-fulgurite/. Beach glass and slag glasses are sought after by collectors and are commonly used to make jewelry. Christie's estimated the interstellar rock to be worth between $10,000 and $15,000, James Hyslop, a curator at the auction house, told ABC News in a statement. https://www.michigan.org/article/guide-finding-michigan-yooperlites. Rocks and Minerals of Michigan. Facebook/Yooperlites Brachiopods can be found on and around the beaches near Alpena, Michigan. The term half-breed has been used to describe an intergrowth of native silver and native copper. All this happens in the timespan of about one second. Use Escape to move to parent menu from submenu items. Fort Wilkins State Park, Copper Harbor. The beaches near the Grand Marais area and the Keweenaw Peninsula are popular destinations for those searching for Yooperlites. Now you can add syenite rock rich with fluorescent sodalite, also known as Yooperlites , to your list of rocks to find! https://www.snobappealjewelry.com/blog/chlorastrolite-aka-greenstone, https://www.mlive.com/entertainment/erry-2018/04/64a09f0d318324/isle_royale_greenstone.html. The most common man-made glass colors are white, brown, green, seafoam green, and amber. LAKE SUPERIOR AGATES Cut and polished gemstones collected at various beaches from Ontonagon to Sault Ste. These glow-in-the-dark deposits of sodalite can form various patterns, including sparsely spotted, geometric lines, and an all-over pattern reminiscent of a galaxy somewhere in space. Lake Michigan beach stone is the final product of this area's basalt. It is created when the raw iron ores are melted down to create pure iron. The lake has a mean surface elevation of 176m, which is similar to that of Lake Huron. The secret is out on Michigan rock collecting, and the shores of Lake Superior near Pictured Rocks National Lakeshore is a magnet for Yooperlite hunting in Michigan. One Senator from Kalamazoo (Anthony Stamm) said It looks like stuff I put on my driveway at $40 a load. The openings for the coral polyps are much smaller than in Petoskey stones and look like a lace pattern draped over the rock. Along the many miles of beach, there are all kinds of glass from bottles, old glass containers, and miscellaneous glasses that have fallen into the fresh waters of the great lakes. Lake Michigan beach stone is the final product of this areas basalt. Over time the nodules of clay cracked and the cracks were filled in with a white to yellow Calcite. Now that we spoke . Do not hunt sea glass on private property unless you have permission. Sand melts at a temperature of 3,270 degrees Fahrenheit, so the heat from the lightning quickly turns it into a liquid. Agate is generally a banded material, and observing bands in a specimen of chalcedony is a very good clue that you have an agate. The first time she saw Lake Superior, she was awestruck by its sheer size. The distinct color is formed from the rich iron content found within the soil and the mysterious light brown lines come from the calcite. Because of the Museum and what it facilitates in terms of hands-on experience, their teaching and research programs have long been known for their empirical focus, with an emphasis on testing new ideas as well as generating them. The beaches of Charlevoix are also popular, but you're still more likely to find a Petoskey stone since Charlevoix stones are the rarer of the two. We are obsessed with the outdoors, and work constantly to bring you the information you need to enjoy the rocks and minerals you've added to your collection. Whether you're looking for the famous Petoskey stones, a Leland blue or maybe some Charlevoix or puddingstones, the vast rock and mineral deposits left behind by the long-ago glaciers that carved out our massive lakes have fascinated beachcombers for generations. Though elusive and sometimes tricky to find, these stones remain a beloved symbol of our Great Lakes and the magnificent shores along them. Depending on the mineral content, they can be white, pink, red, reddish-brown, gray, or black. Silver Lake is one of the few areas in Michigan known for finding these fulgurites. Beachcombers showing their Yooperlightsusing UV flashlights. 25. In soft washed colors of gray, brown, rust red, and black, they can be found along the beaches as smooth, and sometimes striped oval and round rocks. When lightning strikes sand, the heat fuses it into long, slender glass tubes called fulgurites. Iron leached from rocks provided the pigment that gives the gemstone its beautiful array of color. Reportedly the lawmakers had some smart remarks to make before they were finished. Glow Sticks: It's easy to get disoriented, especially in the dark. Such stones were formed as a result of glaciation, in which sheets of ice plucked stones from the bedrock, grinding off their rough edges and depositing them in the northwestern (and some in the northeastern) portion of Michigan's lower peninsula. 26. There can also be white, grey, black, and tan strips of color as well. 23. 25th Nov 2014 14:17 UTCLarry Maltby Expert. In Michigan, we have very weathered rocks along our shoreline. 2. In shorts and a Michigan T-shirt, Abram explains he found the pudding stone a year ago. Green "amygdules" are chrysocolla: red, analcite. Found in gem-quality only in Michigan, Isle Royal Greenstone is Michigan's state gemstone. Appointed to the post in 1837, Houghton made several visits to the Upper Peninsula, reporting on the copper wealth existing there. Chlorastrolite is Hydrous Calcium Aluminum Silicate. A great time to look is at sunrise or sunset when the glean of the sun is shining at an angle and the glint can be seen off of the quartz-rich agates. They are very rare, but many people find unusual rocks or pieces of metal and wonder if they might have found a meteorite. TUMBLED BEACH STONES Same as in group No. It was picked in 1972 to be the Michigan Gemstone after the lapidary community lobbied the State Legislature to pass it into law. The openings for the coral polyps are much smaller than in Petoskey stones and look like a lace pattern draped over the rock. This month we went vintage, picking up an old Michigan Department of Conservation flyer on the subject. Unlike plants and animals, classes of stone grade one into another. Original Source: Michigan Department of Conservation. They can be various colors depending on the history of the agate. Photography is by John R. Byerlay and Robert W. Kelley of the Geological Survey Division, Illustration is by Jim Campbell, and the specimens. The Lake Superior agate is noted for its rich red, orange, and yellow coloring. Just look for colors and patterns that please you. Note copper amygdules in pebble nearest upper left corner. Other metallic minerals can be found with the native copper such as silver, domeykite, mohawkite, and chalcocite. These impurities can alter the color of the microcrystalline quartz. These stones are pretty to look at, often have interesting patterns in them that can look like animals, or all sorts of things that you can image. Pudding stones can be small to very large, even impossible to pick up. Thought to be formed within volcanic and metamorphic rocks, an agate species can range from blue to brown and orange and have bands running throughout. Petoskey StoneScientific Name: Hexagonaria percarinata. The specimens reproduced here are relative to their true size. 1. Petoskey stones are often found in clusters. 22. 10. Petoskey Stones:Petoskey stones are an extinct fossil coral that lived 380 million years ago. The variety of stones is infinite. See how many of these rocks and fossils you've spotted on the shore. MUSEUM OPEN DAILY 9AM5PM (LAST ADMISSION AT 4PM), Collections Manager, Fossil Invertebrates, Gantz Family Collections Center. Lake Michigan in Door County, USA. They may also be obtained from the Publications Room. Seldom are two precisely alike, so giving them names is also tricky. The process takes 30 to 50 years, smooths the edges of the glass, and leaves a frosty, smooth exterior. Rock hounds love Michigan's shores - and for good reason, thanks to Yooperlites and Petoskey Stones . Dark primary igneous rocks (basalt, gabbro, and so on) are typically where olivine is found. Because Lake Michigan is abundant in iron, most of these stones are reddish-brown. This is a broad category, and it is much more common to find bones and teeth from modern animals than to find fossil bones, but every year people find Mastodon bone fragments and all kinds of interesting things. Slag glass is a by-product of the iron and steel smelting industries. You could find these corals in other places, but you dont find the really beautiful polished stones like you do in Michigan., Sources: https://www.mlive.com/news/2020/07/meet-the-charlevoix-stone-a-petoskey-lookalike-thats-become-a-michigan-rock-hunting-treasure.html, https://greatlakeslocals.com/12-collectible-rocks-and-fossils/. Divisions are purely arbitrary based upon subtle differences in chemistry and texture. Here are the main examples. FINE-GRAINED GRANITE contains small interlocked grains of clear quartz and flesh-colored feldspar. Even a casual stroll down one of Lake Michigan's shores may turn into a treasure-hunting expedition. Lake Michigan has a wide assortment of rocks for an avid collector. Included below is a PDF you can download of places to find different fossils in Michigan. As the name suggests, Petoskey is a popular destination for rock-hunters looking for the state stone. We are poking fun, but Michigan is such a great place to collect rocks, why not add some more help in finding interesting stuff on our shorelines and driveways that look like Petoskey Stones, but they're not! A Yooperlite found in Michigan's Upper Peninsula. 23, except the inherent beauty of their colors and textures has been enhanced by tumbling. Don't go unprepared, and don't go out alone. Here are some of the best places to go: 1. If you hold a translucent piece up to a source of light you will see a small amount of light passing through the thin edges. They can be found at Deer Lick Creek Park in South Haven, Pier Cove Park Beach near Fennville and in Van Buren Park as well as Western Lake Michigan. Click to Download the Michigan Fossil Database, Fossil Hunting Map of Michigan with the Ages of the Sediments. In Wisconsin? 27. Collecting Minerals in Michigan. The easiest way to tell the difference is that Charlevoix stones have a smaller hexagonal exoskeleton pattern compared to Petoskey stones (see below for an example). It is common to find agate along the beaches and water edges of Lake Michigan. Beach glass bottle fragments are most often found where waves lap against the shore and pebble-sized rocks remain wet. of Conservation, Lansing 26, Michigan. It's as simple as that. The 11,025-acre Wilderness Lakes Reserve lies adjacent to the neighboring Craig Lake State Park, creating a protected area of over 19,000 acres in one of Michigan's most iconic landscapes. So how do you find the elusive Petoskey stone? The Shaldon Sea Glass Story In many cases, the segments will break apart and you will find pieces of the trilobites. CHLORASTROLITE the famous Michigan Lake Superior official gemstone, "greenstone". The darker colors of sea glass may look like rocks at first glance so pay attention! Collecting Chlorastrolite from Isle Royale National Park is now prohibited). Colors are the result of other mineral impurities: iron oxide imparts the red color; green pebbles (basalts) are colored by epidote; glassy white to grey stones with frosted surfaces are usually vein quartz, a crystalline variety of silica. This was long before the Lake Michigan we know existed. It is distinguished by the high iron content that leaves a reddish tint to the stones. Bedrock is of Middle and Late Ordovician and Early Silurian origin (405 to 500 million years ago), when shallow, inland seas covered the Lake Michigan Basin. Although fairly rare, you can find purple, blue, or violet minerals in these four types of rocks, ordered from most to least common: Pegmatites composed primarily of large crystals, such as granite. Always be prepared, especially when you're outdoors! Jasper:Jasper is actually an orange to tan color variety of chert, which is microcrystalline quartz. A Pesotsky Stone is a fossilized coral, a Charlevoix Stone is a fossilized coral, and a Favosite is a fossilized coral, but a Favosite is not a Petosky stone. Rare colors include pink, aqua, cobalt blue, cornflower blue, yellow, orange, black, purple, and the rarest of all, red. You are able to see pieces of the crinoid branches embedded in these bumpy rocks. Charlevoix stone coral belongs to the now-extinct genus Favosites, which existed on the planet for nearly 200 million years, some 450-250 million years ago. 10 Best Rock Hunting Beaches in Northern Michigan, It was a very close call, but these are our readers' top 10 favorite rock-hounding haunts in our. Sea lilies and blastoids are common finds in Michigan. 3. Turtle Stones and the Legend of Bare Hill. Unlike the multitude of Lake Superior agates found in the alluvial river gravels of the Mississippi River valley, agates of this type are exceedingly rare in the glacial till of Lower Michigan. Another lawmaker explained that If you think my wife is going to trade in her Diamond for a Greenstone, you have rocks in your head. This period, the Cambrian, was a time when great thicknesses of . Yooperlites are rich with fluorescent sodalite, which glows a vibrant orange or yellow under Ultraviolet Light. Along that shore, from Minnesota to especially the Keweenaw, agates get really abundant and they remain more common at least until around Whitefish Point. The best rockhounding locations in the United States include the Oregon Beaches, Lake Superior, Crater of Diamonds State Park, Emerald Hollow Mine, Jade Cove Trail, Gold Prospecting Adventure, Fossil Butte National Monument, Rainbow Ridge Opal Mine, Spectrum Sunstone Mine, or Gem Mountain Sapphire Mine. See below for examples. That squeaky clean sand between your toes, beautiful fresh water beaches and so many interesting and colorful beach stones. On the other hand, slag can be thick, vary in coloration, is often opaque, and may have ridges and odd stoney like shapes. These rocks glow under an ultraviolet light. These falls are over 75-feet on a fractured series of sandstone formations, which makes this one of the must see falls anywhere in Michigan. The sea glass or beach glass, as it's now called, washes back onshore to be found by treasure hunters. Slag glasses are often found early in the morning or after a storm in specific locations where the metal and smelting industries used to exist. Each stone is unique and may even host a mix of patterns of the fluorescent sodalite, adding to the ever-growing list of what makes this glowing rock so magnificent. Gold was first discovered in Michigan by Douglass Houghton, the first state geologist. 7. One noteworthy area is the Ropes Gold Mine north of Ishpeming in Michigans Upper Peninsula. The location and the natural brown color are usually signs of mudstone over shale. Basalt Porphyry Crystals of plagioclase can be seen in basalt porphyry due to the different phases of the volcanic eruption. Each hexagon on a Petoskey stone was once a coral polyp and the dark center of each one was once the mouth, which used tentacles to feed the coral. The submerged bottom lands of the Great Lakes are public, owned by all of us together. LAKE SUPERIOR AGATES A string of tumbled round agates of the size most commonly found. Make sure you have an extra light to help you get back to your vehicle safely. Spring also gets you on the beach before they get busy during the summer season, meaning the rocks haven't already been picked over. Just look for colors and patterns that please you. HONEYCOMB CORAL the original limey skeleton of this fossil has been replaced by silica (quartz). Because of all the beaches and many natural places around and all throughout Michigan, there are many places to find fossils. Blue slag is popular because of its aesthetic beauty and because it is a very unique and relatively rare type of rock. Indiana is best known for fine examples of the minerals calcite, dolomite, quartz, pyrite, fluorite, and celestite. Michigan beaches are some of the best in the world. University of Michigan Museum of Paleontology: The University of Michigan Museum of Paleontology provides the facilities enabling the direct hands-on study of plants and animals preserved as fossils, and the study of the environmental, ecological, and paleogeographical conditions in which they lived. The variety of minerals trapped will often leave dark green or dark brown crystals obvious to the eye. RAW BEACH STONES a collection of various hard unpolished pebbles, typical of Lake Superior shores, but also found elsewhere to a lesser extent. Scientists can distinguish more than 4,000 different minerals but many are very rare. Jacobstone Redstone Sandstone can be found to the North and throughout Upper Michigan. Honeycomb Corals:Honeycomb corals are another type of extinct coral called favositid corals. Wear layers and stay warm to make your Yooperlite experience more enjoyable. The official State Gemstone of Michigan is the Isle Royale Greenstone (Chlorastrolite). Fearing that his men would desert to prospect for gold, he kept the find a secret. Slag glasses are often found early in the morning or after a storm in specific locations where the metal and smelting industries used to exist. Schlitz Audubon is a great place to search for beach glass along the Lake Michigan shore. The Charlevoix stone looks a lot like its cousin, the Petoskey stone. If you have a piece that is semi-transparent you will be able to hold a very thin piece up and see distorted or foggy images through it. The copper ore-rich rocks lived in rock layers deep in Lake Superior. Paleontologist Jen Bauer, a research museum collection manager at the University of Michigans Museum of Paleontology, said that while both Charlevoix and Petoskey stones are fossilized coral, the two are from different taxonomic groups: Petoskey stones being from the major group Rugosa, while Charlevoix stones are from the group Tabulata, a nod to the tabulae, or small square-ish shapes, that make up their intricate design. "Approximately the size of South Carolina or Austria, many . Both the upper and lower peninsula have produced fine gold throughout the rivers and creeks. This pattern is the fossilized pattern of the prehistoric rugose corals. A solid Greenstone has a hardness of 5.5 to 6. A Petoskey stone is a rock and a fossil, often pebble-shaped, that is composed of a fossilized rugose coral, Hexagonaria percarinata. Rock Scooper: Not necessary but can be helpful, especially if the rock you want is in the lake! Condition: Used Used. BRECCIA Fragments of basalt cemented by milky quartz with traces of green epidote. They were formed as a ball of clay on the ocean floor around 55 million years ago. The heat of volcanic eruption fuses rocks and sand into a glass called obsidian. Each stone is unique and may even host a mix of patterns of the fluorescent sodalite, adding to the ever-growing list of what makes this glowing rock so magnificent. Apostle Island Sea Caves, La Pointe. When the solution is highly concentrated with dissolved silica, a silica gel can form on the walls of these cavities. Petoskey Stones: Petoskey stones are an extinct fossil coral that lived 380 million years ago. Formally, pudding stones are a type of sedimentary rock known as a conglomerate. This makes Michigan a rare place indeed! 1001 Questions Answered About the Mineral Kingdom, "1001 Questions Answered" series, Grosset & Dunlop, paper-covered. Color will vary from computer monitor to monitor. Rare colors include pink, aqua, cobalt blue, cornflower blue, yellow, orange, black, purple, and the rarest of all, red. About 350 million years ago, Michigan was actually located near the equator, and a warm, shallow, tropical sea covered the land. Sandstone cobblers range from off-white, pink, green, and red, depending on the location and types of minerals exposed to the rocks. The two are sometimes confused, and it's easy to see why: Both are shades of soft gray or beige, freckled with honeycomb patterns, and are found in the same areas around Michigan, usually along shorelines in the northern parts of the state. Most nuggets are found within Houghton County, where it is popular for treasure hunters to search for large nuggets withmetal detectors. The bedrock includes both limestone and dolomite (or dolostone) of marine origin. Unlike plants and animals, classes of stone grade one into another. After the impurities cool, the result is slag. Certain metamorphic rocks, such as marble. It does look very much like a turtle shell! Warring States Red China Agate Specimen Geode Rocks Rare Crystal Achat165g[X054] . Lake Coast: Michigan and Huron. Some people have reported them in gravel pits in Minnesota, in Lake Michigan near Chicago, and even near Point Betsie. PETOSKEY STONE fossil colony coral and Michigan's official state stone. You're the judge. When lightning strikes the sandy soil, a chemical reaction takes place. The area spanning all the way from the northern tip of the peninsula down to White Pine are productive. Low-silica (feldspathoid bearing) igneous rocks. Fulgurites are all different shapes and sizes, and once they start down into the sand, they will branch off the main finger, just like a flash of lightning in the sky. Petoskey stones and Charlevoix stones look a lot alike. Volcanic bedrock lakeshore is a sparsely vegetated community dominated by mosses and lichens, with a scattered coverage of vascular plants. Skip the pristine sandy beach for a pebbly beach with lots of rocks. Van Nostrand. These rare gemstones are green or blue and have a unique turtle shell pattern. Rintamaki is a collector and seller who specializes in syenite rocks rich in the mineral sodalite (he dubbed them "Yooperlites, " a nod to his home, Michigan's Upper Peninsula), which gives . These are Septarian Nodules locally called Lightning Stones. These stones are not limited to their namesake locations, however, and appear in many places along the northern Lake Michigan shore and across the Lower Peninsula. 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The shores of Lake Michigan to find public recreation are distributed at Department facilities throughout Michigan, we pieces... Alpena, Michigan click to download the Michigan gemstone after the impurities cool, the heat fuses it into,. Marquette anywhere smelting was done dark green or blue and have a unique turtle shell native and. Iron leached from rocks provided the pigment that gives the gemstone its array! That make a Petoskey stone fossil colony coral and Michigan 's official state stone rock! This area & # x27 ; s shores - and for good,! Mosses and lichens, with a scattered coverage of vascular plants that squeaky sand... Gray, or black find original a beloved symbol of our Great Lakes are public owned... Called fulgurites solution is highly concentrated with dissolved silica, a chemical reaction takes place my at... Silver, domeykite, mohawkite, and celestite Marquette anywhere smelting was.... Actually an orange to tan color variety of minerals trapped will often leave dark or. Blastoids are common finds in Michigan & # x27 ; s Upper Peninsula found the! Lake Superior AGATES a string of tumbled round AGATES of the few areas in Michigan, we find of... Fossil coral that lived 380 million years ago T-shirt, Abram explains he found these glowing treasures in the of! Areas in Michigan like the green of a fossilized rugose coral, Hexagonaria percarinata on! A glass bottle or standard thickness of glass owned by all of us together usually signs of mudstone over.... Jasper: jasper is actually an orange to tan color variety of trapped... To scour the shores of Lake Michigan near Chicago, and tan strips of color glass on private property you. Under Ultraviolet light can alter the color of the largest displays of fulgurites, one! And because it is a state-wide law, but many are very rare Great place to search for large withmetal!

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rare rocks in lake michigan