Beryl · Beryl

Beryl (dark specimens)

Dark beryl covers opaque to semitransparent grey-black crystals used mostly as specimens, carvings and beads.

Colour
grey

Transparency
Variable

RI
1.577–1.583

SG
2.67–2.90

Mohs
7.5–8.0

Birthstone
May · March

🔒 Full JDMIS reference record

Sign in to unlock price ranges by tier, common misidentifications, diagnostic inclusions, treatments, spectra, trade names and sources — free with the GT200 Gem Identification course.

GT200 Gem Identification ↗ Sign in

Related gems

Pyrite Black Obsidian Labradorite (spectrolite) Hydrogrossular

Browse the free gem reference · Test your eye — the Great Gem Quiz · Singapore gem testing labs