Tanzanite — specimen 0383, photo © NMNHS

Tanzanite — specimen 0383

Origin

East Africa

Tanzania, Manyara, Lelatema Mountains, Merelani Hills, 3.58333°S 37.00833°E

Data

Weight: 0.54 ct; size: 5.55 | 4.76 | 3.29 mm; shape: oval; colour: medium light blue; strong; clarity: eye clean; cut: excellent; treatment: heating.

Notes

Very clean specimen; design ‘Ovalimixtum ST’, excellent cut by Tan Pen.

Other specimens

More information from ‘Classification’

Tanzanite

A variety of zoisite with a blue to blue-violet colour. Nearly all tanzanites on the market have been heat-treated to produce this colour. First reported from the Merelani, Lelatema Mts, Manyara, Tanzania.