- Talc
- Tantalite (Columbite)
- Television Stone (Ulexite)
- Tellurium
- Tennantite (Tetrahedrite)
- Tephroite
- Tetrahedrite
- Thenardite
- Thomsonite
- Thorite
- Thorogummite
- Tincalconite
- Titanite (Sphene)
- Topaz
- Torbernite
- Tourmaline
- Tremolite
- Tridymite
- Triphlite
- Turquoise
- Tyrolite