Stibiotantalite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.5 – 6.0
Specific Gravity
7.2 – 7.9
Refractive Index
2.37 – 2.45
Crystal System
Orthorhombic
Luster
Adamantine,Resinous
Cleavage
Distinct
Fracture
Sub-Conchoidal
Color
various
Birefringence
0.08
Mohs Hardness
| Mohs | Reference mineral | Stibiotantalite |
|---|---|---|
| 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 Stibiotantalite
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 Stibiotantalite
Stibiotantalite is a rare antimony-bearing tantalate mineral that forms yellow to brown, reddish-brown, or green crystals with an adamantine to resinous luster in granitic pegmatites. It is found in limited localities including Western Australia, Norway, and Namibia, and is of interest both for its tantalum content and as a collector's specimen. Well-formed crystals from Greenbushes, Australia are particularly fine.
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Stibiotantalite?
Stibiotantalite is a rare antimony-bearing tantalate mineral that forms yellow to brown, reddish-brown, or green crystals with an adamantine to resinous luster in granitic pegmatites. It is found in limited localities including Western Australia, Norway, and Namibia, and is of interest both for its
What is the hardness of Stibiotantalite?
Stibiotantalite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.
What color is Stibiotantalite?
Stibiotantalite is primarily Various.
How much does Stibiotantalite cost?
Stibiotantalite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Stibiotantalite?
Stibiotantalite belongs to the Orthorhombic crystal system.