Gem Testing with the Spectroscope • Lotus Gemology

jade

Made You Look • The Challenges of Identifying Inclusions at First Sight

Gem Testing with the Spectroscope • Lotus Gemology

jade

A Review of Analytical Methods Used in Geographic Origin Determination of Gemstones

Hyperion • Inclusion Search Engine • Lotus Gemology

OPL diffraction grating spectroscope Gemology, Gem drawing, Sapphire stone

Ceylon Gemological Instruments

Hyperion • Inclusion Search Engine • Lotus Gemology