JDMISGem Reference
Cyclosilicate · Sugilite

Sugilite

Sugilite — Sugilite

South Africa's purple manganese-field treasure: opaque to gel-translucent magenta, single-source, and separated from look-alikes by its 1.61 RI, 2.74 SG and 550 nm band.

Colour
purple
Transparency
Opaque
RI
1.607–1.610
SG
2.69–2.80
Mohs
5.5–6.5
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