Home > Borate Minerals – April 22 > MS1795 vanadium-bearing Dravite

vanadium-bearing Dravite

Dravite is one of the longest known members of the tourmaline group (Henry et al., 2011). Nominally dravite is the sodium magnesium aluminum endmember of a solid solution series with iron-dominant schorl. The name dravite recalls its original occurrence in the Draugebiet (Drave in Latin) of Austria (Tschermak, 1884). Were dravite to have its ideal composition, the mineral would be colorless. Minor chemical substitution imparts various colors to the species, typically brown. This example contains minor vanadium and a lesser amount of chromium, both of which cause green coloration.

This is a single crystal of deep green dravite. The crystal is singly terminated. Sharp and lustrous; a bit of micro-chipping on the crystal edges keeps down the price of this example.

Price: $200

Item code: MS1795

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