Phantom quartz: Difference between revisions
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Revision as of 04:54, 8 April 2010
Phantom quartz is a variety of quartz, or "rock crystal", that, over the course of millions of years, forms over earlier rock crystals that already existed. It takes its name from the particular structure of its crystallization: each crystal displays the outlines of numerous smaller crystals, knowns as phantoms. It is found in Austria, Brazil, Madagascar, Switzerland, and the United States.
Like regular quartz, the chemical composition of phantom quartz is Template:SiliconTemplate:Oxygen, and its hardness is 7.[1] The available forms of phantom quartz are crystal groups, single crystals, crystal points, touchstone, tumbled stones; as a jewelry gemstone, usually found in the form of as pendant. The crystallization is a trigonal crystal.
References
- ^ "PHANTOM QUARTZ Factsheet & Information Page". Mineral Inventory and Factsheet Index. Gem & Mineral Miners, Inc. 2001-01-14. Retrieved 2007-10-19.
See also
External links
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