Augite

Q: What is Augite?

Augite is a dark green to black calcium magnesium iron pyroxene and one of the most abundant rock-forming minerals in basalts and gabbros worldwide. Gem-quality transparent brown to greenish crystals are occasionally faceted for collectors, though its dark color and strong cleavage limit its appeal

Q: What is the hardness of Augite?

Augite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.

Q: How much does Augite cost?

Augite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.

Q: What is the crystal system of Augite?

Augite belongs to the Monoclinic crystal system.

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Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 5.5 – 6.0

Specific Gravity 3.19 – 3.56

Refractive Index 1.671 – 1.774

Crystal System Monoclinic

Luster Vitreous,Resinous,Dull (Earthy)

Fracture Uneven,Conchoidal

Color various

Pleochroism Pale green, pale brown, green, greenish yellow - pale brown, pale yellow-green, violet - pale green, grayish green, violet.

Mohs Hardness

Mohs Hardness: 5.5 – 6.0

1 Soft10 Hard

Crystal System

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Augite

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

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About Augite

Augite is a dark green to black calcium magnesium iron pyroxene and one of the most abundant rock-forming minerals in basalts and gabbros worldwide. Gem-quality transparent brown to greenish crystals are occasionally faceted for collectors, though its dark color and strong cleavage limit its appeal as a jewelry stone. Large, well-formed augite crystals from Italy's Lazio volcanic region are prized mineral specimens.