Prasiolite

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Physical & Optical Properties

Mohs Hardness 7,0
Specific Gravity 2,65
Refractive Index 1,544 – 1,553
Crystal System Trigonal
Cleavage None
Fracture Conchoidal
Color various
Birefringence 0,009
Dispersion 0,013
Pleochroism Very weak: light green - pale green

Mohs Hardness

Mohs Hardness: 7,0
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Prasiolite

Prasiolite, also called green amethyst, is a pale leek-green variety of quartz that most commonly results from the heat treatment of amethyst or yellow quartz. Natural prasiolite is exceptionally rare, found in only a few localities including Montezuma, Brazil, and a deposit in Poland. Its soft, translucent green color and availability in large faceted stones make it a fashionable alternative to more expensive green gemstones.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Prasiolite?
Prasiolite, also called green amethyst, is a pale leek-green variety of quartz that most commonly results from the heat treatment of amethyst or yellow quartz. Natural prasiolite is exceptionally rare, found in only a few localities including Montezuma, Brazil, and a deposit in Poland. Its soft, tra
What is the hardness of Prasiolite?
Prasiolite has a Mohs hardness of 7.0, making it excellent for use in jewelry.
What color is Prasiolite?
Prasiolite is primarily Various.
How much does Prasiolite cost?
Prasiolite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Prasiolite?
Prasiolite belongs to the Trigonal crystal system.

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