T
Tachanarite
Talmessite
Tangdanite
Taniajacoite
Tanzanite
Tarbuttite
Tellurite
Tennantite
Tenorite
Tetrahedrite
Thaumasite
Theisite
Thomsenolite
Thomsonite
Thorianite
Thorikosite
Thorite
Tinzenite
Titanite
Tobermorite
Todorokite
Tooeleite
Topaz
Topazolite (Garnet Supergroup)
Torbernite
Tourmaline
Tridymite
Triploidite
Truscottite
Tschernichite
Tschörtnerite
Tsumcorite
Tučekite
Tunellite
Tungstenite
Tungstibite
Tuperssuatssaite
Turquoise
Tuscanite
Tvrdyite
Tyuyamunite
Tyrolite