Name |
Also
Known As |
Variations |
Distribution Complete |
Description Complete |
Pictures Added |
Macungie Jasper |
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Madera Chert |
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Madera Springs Wood |
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Madison Banded Chert |
Montana Chert |
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Madison Chert / Chalcedony |
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Madison Moss Agate |
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Madison Quartzite |
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Magic Mountain Wood |
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Magnesite Turquoise |
Chalk
Turquoise, Marshmallow Turquoise, Mohave Green Turquoise, White
Turquoise |
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Magnificent Redwood Petrified Wood |
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Magothy Quartzite |
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Magothy Quartzite |
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Mahogany Obsidian |
Mountain Mohogany Obsidian |
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Mahoning Chert |
Upper
Mercer Chert, Sky Hill Chert |
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Malheur Basalt |
Malheur County Basalt |
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Malheur Chert |
Malheur County Chert |
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Malm Gulch Wood |
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Manassa Turquoise |
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Manitoulin Formation Chert |
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Manitoulin Quartzite |
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Mann Creek Jasperized Wood |
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Manning Fused Glass |
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Mannong Fused Glass |
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Mannoth Meadow Chert |
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Mansfield Sandstone |
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Mansker Chert |
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Mantorville Limestone |
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Maquoketa Chert |
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Maravillas Gap Chert |
Canyon
Chert |
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Marble Falls Chert |
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Marblehead Felsite |
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Mariposite |
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Marmalade Jasper |
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Marmora Chert |
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Marquette Rhyolite |
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Marston Jasper |
Christmas Agate |
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Marston Wood (multi-colored) |
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Martin Creek Chert |
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Martinsburg Chert |
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Martinsburg Quartzite |
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Mary Ellen Jasper |
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Mascot Chert / Dolomite |
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Massanutten Quartzite |
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Massillon Sandstone |
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Mastrada Turquoise |
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Matanuska River Jasper |
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Mattapan Felsite |
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Maury Mountain Jasper |
Maury
Mountain Agate |
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Maycock's Point Jasper |
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Mayfield Chert |
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Maynes Creek Chert |
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Mazatzal Argillite |
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McAfee Quartzite |
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McCallum Creek Wood |
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McCann Hill Chert |
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McCaslin Quartzite |
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McDermitt Jasper |
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McDermitt Wood |
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McGinnis Turquoise |
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McGlashan Lake Wood |
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McKenzie County Wood |
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McKittrick Chert |
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McKnight Chert |
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McLean County Chert |
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McNairy Chert Breccia |
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McNairy Quartzite |
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Meadow Mountain Chert |
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Medicine Bow Quartzite |
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Medina Sandstone |
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Meers Quartzite |
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Melon Gravel Basalt |
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Menominee Chert |
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Meramec Gravel Chert |
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Mercer (Lower) Chert |
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Mercer (Upper) Chert |
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Meshik-Stepovak Wood |
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Mesnard Quartzite |
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Metarhyolite |
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Metasedimentary Rocks |
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Metasequoia Occidentalis |
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Metavolcanic Rocks |
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Mettawee Slate |
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Middle Park Wood |
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Milan Rhyolite |
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Miles Canyon Basalt |
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Mill Creek Chert |
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Mill Lack Slate |
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Mill Lacs Argillite |
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Miller Creek Wood |
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Miller Mill Quartzite |
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Miller Peak Argillite |
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Minas Basin Chert |
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Mines Chert |
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Minisink Chert |
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Minnelusa Quartzite |
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Minnelusa Chert |
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Miocine Chert |
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Miongin Coble Chert |
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Miramichi Sandstone |
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Misery Quartzite |
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Miss Moffet Turquoise |
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Missing Link Mountain Quartzite |
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Mississippi Upland Chert |
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Mistassini Quartzite |
Albanel Quartzite |
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Mitchell Chert |
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Mitchell Mesa Rhyolite |
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Mocha Mint Jasper |
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Modoc Plateau Bloodstone / Jasper |
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Moenkopi Sandstone |
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Mogollon Mountain Chert |
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Mogothy Quartzite |
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Mohawk Jasper |
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Mahogany Black Lace Obsidian |
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Mojave Desert Chert |
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Mojave Desert Jasper |
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Mojave Desert Wood |
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Moleen Chert |
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Moline Chert |
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Monkton Quartzite |
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Mono Lake Argillite / Chert |
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Monongahela Chert |
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Monson Slate |
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Montana Agate |
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Montana Chalcedony |
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Montana City Jasper |
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Montana Creek Obsidian |
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Montana Porcellanite |
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Monte Cisto Turquoise |
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Monteagle Chert |
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Monterey Chert |
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Montezuma Turquoise |
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Montrose Chert |
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Moon Mountain Wood |
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Mooney Hollow Chert |
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Moore Ranch Wood |
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Moorehouse Chert |
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Morenci Turquoise |
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Morgan Chert |
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Morgan Hills Poppy Jasper |
Poppy
Jasper |
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Morrison Chert |
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Morrison Chert |
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Morrison Quartzite |
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Morrison Siltstone / Mudstone |
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Morrisonite |
Morrison Jasper, Carrisite Jasper |
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Morrow Mountain Rhyolite |
Uwharrie Rhyolite |
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Moses Coulee Bog Wood |
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Moss Agate |
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Moss Chalcedony |
Moss
Agate |
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Motts Gneiss |
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Mounds Gravel Chert |
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Mount Ararat Soapstone |
Horne
Hill Soapstone |
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Mount Christie Chert |
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Mount Diablo Chert |
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Mount Edgecumbe Obsidian |
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Mount Edziza Obsidian |
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Mount Holly Chalcedony |
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Mount Hornaday Wood |
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Mount Independence Chert |
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Mount Jasper Rhyolite |
Neponset Rhyolite |
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Mount Katamai Wood |
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Mount Kineo Rhyolite |
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Mount Merino Chert |
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Mount Norris Wood |
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Mount Rodgers Greenstone |
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Mount Rodgers Rhyolite |
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Mount St. Helena Jasper |
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Mount Sterling Chert |
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Mount Taylor Obsidian |
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Mount Willard Chert |
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Mountain Jasper |
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Mountainous Star Coral |
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Moxee Hills Wood |
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Moyers Gravel Chert |
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Mozarkite Chert |
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Mud Lake Slate |
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Muddy Mountain Chert |
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Mudshale |
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Mugford Chert |
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Muldraugh Chert |
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Muldraught, Tiger Ridge |
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Mule Mountain Rhyolite |
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Multi-Jasper |
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Munsungun Lake Chert |
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Murray County Soapstone |
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Muscovite |
Common
White Mica, Isinglass, Potash Mica |
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Mushroom Jasper |
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Muskeg Valley Microquartzite |
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Mustard Chert |
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Myrickite |
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