Stibiotantalite

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Physical & Optical Properties

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 Hardness: 5,5 – 6,0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

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.

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.

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