Stibiotantalite is a tantalate mineral found in complex granite pegmatites.

[2] Stibiotantalite constitutes the tantalum endpoint of a Sb(Ta,Nb)O4 solid solution series with its niobium analogue stibiocolumbite.

Stibiotantalite is found in veins and walls associated with tin mines.

Due to its relative softness, it is more likely to be found in mineral collections than in jewelry.

[3] Stibiotantalite has been found in several countries, but the most significant are Mozambique, Sri Lanka, and the USA.