Gem Reference

The over-fired vintage simulant: RI 2.409 SR, dispersion 0.19, SG 5.13, hardness only 5-6. Scratched facet edges and rainbow excess give it away.
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 inBrowse the free gem reference · Test your eye — the Great Gem Quiz · Singapore gem testing labs