Anhydrite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
3.5
Specific Gravity
2.9 – 2.98
Refractive Index
1.57 – 1.614
Crystal System
Orthorhombic
Luster
Vitreous
Cleavage
Perfect
Fracture
Uneven
Color
various
Birefringence
0.044
Dispersion
0.013
Pleochroism
Weak
Mohs Hardness
| Mohs | Reference mineral | Anhydrite |
|---|---|---|
| 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 Anhydrite
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 Anhydrite
Anhydrite is a calcium sulfate mineral chemically identical to gypite but lacking water, occurring in massive, granular, or lamellar form in sedimentary evaporite deposits worldwide. It ranges from colorless to white, blue, gray, or pale violet, and occasional transparent blue specimens are cut as collector gemstones. The finest blue gem-quality anhydrite comes from Peru and Germany, where it can resemble pale aquamarine.
On this page
Jewelry Use
Durability
2/10
Science FYI Family
Frequently Asked Questions
What is Anhydrite?
Anhydrite is a calcium sulfate mineral chemically identical to gypite but lacking water, occurring in massive, granular, or lamellar form in sedimentary evaporite deposits worldwide. It ranges from colorless to white, blue, gray, or pale violet, and occasional transparent blue specimens are cut as c
What is the hardness of Anhydrite?
Anhydrite has a Mohs hardness of 3.5, making it relatively soft for use in jewelry.
What color is Anhydrite?
Anhydrite is primarily Various.
How much does Anhydrite cost?
Anhydrite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Anhydrite?
Anhydrite belongs to the Orthorhombic crystal system.