Premium Content for Members Only
Beryl and Tourmaline Corundum Cubic Zirconium Diamond Natural Emerald Synthetic Emerald Garnet Spessartite Garnet Hessonite Garnet Demantoid Garnet Natural Glass Glass Imitations Cat’s Eye Imitation jade Ivory Lapis Moonstone Opal Pearls Peridot Plastic Quartz Spinel Turquoise Zircon
Table of Contents
Beryl and Tourmaline
Both beryl and tourmaline develop hollow, or “growth” tubes. The gem cutter sees many more of these than the gemologist does, as most are cut away. While they begin …
To read this entire article and hundreds more like it,
Become a MemberAlready a member? Simply login to your account.
