Augite

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Physical & Optical Properties

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

1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Orthoclase 7 Quartz 8 Topaz 9 Corundum 10 Diamond Augite
Mohs hardness of Augite shown against the ten reference minerals, from talc (1) to diamond (10).
Mohs Reference mineral Augite
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Crystal System

β a b c Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

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.

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Frequently Asked Questions

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
What is the hardness of Augite?
Augite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.
What color is Augite?
Augite is primarily Various.
How much does Augite cost?
Augite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Augite?
Augite belongs to the Monoclinic crystal system.

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