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Gemstone Crystal System Density Hardness Refractive index Treatments
Moonstone
monoclinic 2.56 6.0-6.5 1.518-1.526 none

Color:
Colorless, white, cream, peach, brown

Durability:
Good, but well-developed cleavage

Localities:
World-wide


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Moonstone

(K, Na) AlSi3O8

Moonstone is a variety of albite feldspar, which is a sodium aluminum silicate. Moonstones can occur colorless, white, blue-white,and pale shades of peach and apricot. The rarest and most expensive will be colorless with a floating blue color that seems to hover above the stone. This phenomenon is termed adularescence. In India it was believed that moonstones placed in the mouth during a full moon would allow you to correctly envision the future. Until the 19th century, moonstones were thought to make people invisible, allowing only their spirits to wander about. A variation of that belief still persists today. It's been claimed that moonstone can lead to psychic immortality because it fortifies the spirit to stand alone from the body.

In Europe, moonstone is considered the birthstone for June, although in the United States,alexandrite and pearl are the chosen birthstones for June.

The following books are my recommendations for further study.
They are some of the best available.
If you would like a larger selection, please visit the Book Shop.


Gemstones: Symbols of Beauty and Power
by Eduard J. Gubelin, Franz-Zaver Erni


The Curious Lore of Precious Stones:

by George Frederick Kunz


Gemstone Buying Guide: A Guide to Buying

by Renee Newman


Gems: Their Sources, Descriptions and Identification...
by Robert Webster, Peter G. Read (Editor)
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