- Moonstone (gemstone)
Moonstone General Category Feldspar variety Identification Color Can be numerous colors, including blue, grey, white, pink, green and brown Fracture uneven to conchoidal Mohs scale hardness 6.0 Luster Opalescent Streak white Specific gravity 2.61
Moonstone has been used as jewelry for centuries, including ancient civilizations. The Romans admired moonstone, as they believed it was born from solidified rays of the moon. Both the Romans and Greeks associated Moonstone with their lunar gods and goddesses.
The most common moonstone is of the mineral adularia. The plagioclase feldspar oligoclase also produces moonstone specimens. Moonstone is feldspar with a pearly and opalescent luster. An alternate name is hecatolite.
Moonstone is composed of two feldspar species, orthoclase and albite. The two species are intermingled. Then, as the newly formed mineral cools, the intergrowth of orthoclase and albite separates into stacked, alternating layers. When light falls between these thin, flat layers, it scatters in many directions producing the phenomenon called adularescence.
- ^ "Moonstone" American Gem Trade Association. Retrieved 21 January 2011.
- ^ a b c http://www.mindat.org/min-2774.html Mindat.org
- ^ "Moonstone" Encyclopædia Britannica, 2011. Web. 20 Jan. 2011.
- ^ "Moonstone - Florida State Symbols". Florida Division of Historical Resource. http://www.flheritage.com/kids/symbol.cfm?id=17. Retrieved 1 Sep 2011.
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