Glossary

Tungsten

Tumbaga

Tsavorite

Troy weight

Trilliant cut

Transparency and translucency

Tourmaline

Toughness

Tortoiseshell

Topaz

Tool

Toe ring

Toadstone

Titanium

Tiger's eye

Tie pin

Tie clip

Tiara

Tanzanite

Synthetic diamond

Symmetry

Symbol

Swiss Gemmological Institute

Superhard material

Sunstone