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Rockhounding in Missouri – What Rocks You Can Find and Where
Geology of Missouri Missouri is located on the North American Craton. The NA Cration is an ancient geologic struction. It makes up the core basement rock forming the North American continent. Above the basement rock, making up the core of all continents, you can find bedrock. Bedrock is a dense, hard rock which in Missouri…
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Upcoming Rockhounding Events in Montana Sapphire (Corundum) Streak: Colorless Hardness: 9 Chemical Formula: Al₂O₃ Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium. It is typically blue, but natural sapphires also occur in yellow, purple, orange,…
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Upcoming Rockhounding Events in Tennessee Pearl Streak: White Hardness: 3 Chemical Formula: CaCO3 Pearls are an organic mineral formed inside a mollusk. The mollusk takes aragonite, the same mineral that makes up its shell, and builds up concentric layers around any foreign particle that enters the mollusk’s mantle. Pearls vary widely in color and shape,…