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Crystal Chrysoprase

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Chemical Formula

SiO2 (with a high level of nickel impurities)

Color

Green

Hardness

7

Crystal System

Hexagonal

Refractive Index

1.54 - 1.55

SG

2.63 - 2.65

Transparency

Translucent to nearly opaque

Double Refraction

.009

Luster

Vitreous to waxy

Cleavage

None

Mineral Class

Quartz (Chalcedony)

 

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