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 Home / Gem Library / Natural Gemstones / Stibiotantalite May 29, 2023  

Natural Stibiotantalite
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There are 3 Stibiotantalite(s) available at

Stibiotantalite is a strongly dispersive oxide mineral of antimony and tantalum. It is found primarily in complex granite pegmatites. If the quantity of niobium exceeds the tantalum content, the mineral is called stibiocolumbite.

It is translucent to transparent with a hardness of 5.5 on Moh's scale and an adamantine luster

The name Stibiotantalite reflects its antimony (Greek - stibi) content and similarity to Tantalite. It forms transparent or semi-transparent yellowish to brownish equant or flattened prismatic crystals. It is heavier, softer and brighter than tantalite.

Stibiotantalite can be cut into bright fiery golden-brown gems which have some resemblance to sphalerite.

Known Facts
Color Key: Cream to yellow to dark or greenish brown, reddish.
Refractive Index: 1.55 - 1.69
Chemical Composition: Sb(Ta,Nb)O4
Hardness: 5.5
Density: 6 - 7.57
Crystal Group: Orthorhombic
Ocurrence: Mozambique, USA (CA), Myanmar, Afghhanistan, Brazil.

Stibiotantalite is found in veins and walls associated with tin mines. Due to its lack of hardness, it is more suitable in collections rather than in jewelry.

Stibiotantalite Stibiotantalite Stibiotantalite
Check our Top, Largest, Smallest or Latest Stibiotantalite's.

Stibiotantalite Stats/
Popularity Index: 7329hits
Total Items: 3items
Total Weight: CTS 1.68
Cheapest: USD 225.00
Most Expensive: USD 563.00
Largest: CTS 0.67
Smallest: CTS 0.34
Last Added: 06/17/22 08:29:20

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