Interi holds this rare collection of calcite crystals, one of American Mineral Treasure specimens of high honor (pg. 337).
Coming from the Elmwood Mine in Tennessee, they are heralded as examples of the world’s finest forms of calcite. The minerals are deposited on the walls, floors, and ceilings of the geological caverns formed from the gases of calcium carbonate and zinc. Due to the unusual formation of sphalerite and exceptionally large crystal clusters, they are unequaled by those from any other part of the world.