JDMISGem Reference
Tourmaline · Tourmaline

Achroite (Colourless Tourmaline)

Achroite (Colourless Tourmaline) — Tourmaline

Achroite is rare colourless tourmaline, usually a collector stone cut from chromophore-poor crystal zones.

Colour
colourless to white
Transparency
Transparent
RI
1.624–1.644
SG
3.00–3.26
Mohs
7.0–7.5
Birthstone
October
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