25g,2pcs Smart Subulate Colourful&Golden PYRITIC CALCITE Point Crystal

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  • Item Category: Natural History
  • Source: eBay
  • Sold Date: Mar 27, 2013
  • Channel: Auction House
25g,2pcs Smart Subulate Colourful&Golden PYRITIC CALCITE Point Crystal



1.5 x 0.5 x 0.5 inch


Fengjiashan Mine, Daye City, Hubei Province* China

Calcite is a chemical or biochemical calcium carbonate corresponding to the formula CaCO3 and is one of the most widely distributed minerals on the Earth's surface. It is a common constituent of sedimentary rocks, limestone in particular. It is also the primary mineral in metamorphic marble. It also occurs as a vein mineral in deposits from hot springs, and also occurs in caverns as stalactites and stalagmites.Calcite crystals are hexagonal-rhombohedral, though actual calcite rhombohedrons are rare as natural crystals. However, they show a remarkable variety of habit including acute to obtuse rhombohedrons, tabular forms, prisms, or various scalenohedrons. It may occur as fibrous, granular, lamellar, or compact.

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