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Home / Gem Library / Gemstones Varieties / Stibiotantalite March 28, 2024

Natural Stibiotantalite

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.


  • There are 6 Stibiotantalite gemstones available at Multicolour.com
  • Stibiotantalite(s) are organized in the following categories: Single,  gemstones.
  • Our most expensive Stibiotantalite is USD 5485.00 and largest Stibiotantalite weight is CTS 8.57.
  • Our cheapest Stibiotantalite is USD 86.00 and smallest Stibiotantalite weight is CTS 0.13.

Stibiotantalite Profile

Color information: 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.
Sign of the Zodiac: N/A
Month of the year: N/A
Stibiotantalite Stibiotantalite Stibiotantalite
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.

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Stibiotantalite range/
Stibiotantalite Single
Stibiotantalite Single Octagon Heavily included
Size: 12.80 X 7.20 MM
Weight: 8.570 CTS
Shape: Octagon
Clarity: Heavily included
Usually ships within 24 hours
RECOMMENDED
OUR PRICE
USD 5485.00
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Stibiotantalite Single
Stibiotantalite Single Octagon Slightly included
Size: 3.80 X 1.80 MM
Weight: 0.130 CTS
Shape: Octagon
Clarity: Slightly included
Usually ships within 24 hours
RECOMMENDED
OUR PRICE
USD 86.00
Add to Shopping Cart Save For Later


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