Stibiotantalite, yellow faceted, Pakistan. 1.37 carat. ** SOLD **

Product code: RSTT02
£535.00
PayPal Checkout

Product information

** SOLD **

A very rare Stibiotantalite gemstone from Kunar, Pakistan.

Stibiotantalite is a complex mineral consisting of Antimony, tantalum/niobium and oxygen, chemical formula  Sb(Ta,Nb)O4.

Its metal-rich composition is responsible for its unusual gemmological properties, with an "over the limit" RI of 2.37-2.45 and a high density (specific gravity) of 7.34-7.49. It also has a high dispersion and a hardness of 5.5 on Moh's scale.

This gem has excellent transparency and is only moderately included for the species.
It benefits from an electric and saturated yellow colour, with faceted examples of this quality being very scarce.

weight:  1.37 carats
shape:   Cushion shape cut
dimensions:   5.40 x 4.98 x 3.10 mm
treatment:  None

Technical specifications

Product Code RSTT02
Weight 0.01kg

product review overlay image

Customer reviews

No reviews left yet
Write a review

No reviews have been left for this product, be the first to leave a review