Identify 36 gems by refractive index, birefringence, SG, pleochroism and spectrum; cut scores in 30
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Identify 36 gems by refractive index, birefringence, SG, pleochroism and spectrum; cut scores in 30
Gemology glossary: grading report terms, 4 Cs, clarity, colored gemstones, how sparkle is measured
Gemology lessons to search and quote: the 4 Cs, diamond anatomy, grading reports, moissanite
Gemstone and diamond cuts: ray-traced brilliance, fire and sparkle in 26 gems, 3D and faceting files