Augite
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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 | 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
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
Links may earn a commission at no extra cost to you.
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.
On this page
Jewelry Use
Durability
4/10
Science FYI Family
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.