Zultanite

Zultanite is a gem variety of the mineral diaspore, mined in the İlbir Mountains of southwest Turkey at an elevation of over 4,000 feet.^[1] The mineral's name is a trade name and is equivalent to the trade name Csarite.^[2]

Zultanite rough crystal and gemstones

Turkey is the only place where the gem quality material has been found,^[3]: 154 and at the Ilbir Dağ deposit it has been "formed in open spaces by hydrothermal remobilization of bauxite components".^[1] The gem quality material was first discovered in the early 1980s.^[4]

Zultanite has a hardness of 6.5 to 7.^[5] Depending on its light source, zultanite's color varies between a yellowish green, light gold, and purplish pink.^[1] Its color can be pastel green in outdoor light and beige pink in incandescent light.^[6]: 105