The Encyclopedia
Every Gemstone,
Documented.
Tanzanite
Zoisite · Mohs 6.5–7
Found in only one place on Earth.
Topaz
Topaz · Mohs 8
Hard and brilliant, with a perfect cleavage that demands respect.
Tourmaline
Tourmaline group (elbaite, dravite, schorl…) · Mohs 7–7.5
The most colour-diverse gem species on Earth.
Tsavorite Garnet
Garnet group (almandine, pyrope, spessartine, grossular andradite, uvarovite) · Mohs 6.5–7.5
A family of gems, not a single species.