Emerald - Crabtree Emerald Mine, North Carolina This mineral is often found

This mineral is often found in Argentina

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often containing magnesium or aluminum

Sand dollars did not appear on the evolutionary tree until the Paleocene (~60 million years ago)

often twinned crystals

Emerald - Crabtree Emerald Mine, North Carolina This mineral is often foundThis emerald specimen is from the Crabtree Emerald Mine located in Spruce Pine, Mitchell County, North Carolina. This mine produced emerald specimens beginning in 1895 and remained open until the 1990s. The mine is now permanently closed. The mine shaft extended down for several hundred feet and is currently flooded. This mine is one of the only 2 emerald producing areas in the United States. The other also being located in North Carolina. Many of the