Mineral/rock

Derived from or for

Talc

Arabic talq

Tamarugite

locality at Tamarugal, Pampa, Chile

Tanzanite

locality at Tanzania, Africa

Tephroiite

Greek for ash-colored due to its color

Teruggite

Mario E. Teruggi, geologist, Universitatd Nacional La Plata, Argentina

Thenardite

Louis Jacques Thénard (1777-1857), French chemist, U of Paris

Thermonatrite

Greek therme = heat and natron = soda since it forms from drying soda

Thorium

Thor, Scandinavian god of thunder and lightening in reference to its use in energy

Thulite

Thule, the ancient name of Scandinavia

Tincal

Sanskrit tincal or Malay tingkal = borax. A.k.a. borax.

Tincalconite

Sanskrit tincal = borax and Greek konis = dust or powder; the fact it can form from the dehydration of borax A.k.a. mohavite.

Titanium/ 
titanium dioxide

Latin Titani and Greek Titanes = a Titan, in Greek mythology any one of twelve children of Uranus ( Heaven) and Gaea (Earth); denotes strength

Todorokite

locality at the Todoroki mine, Hokkaido, Japan

Topaz

from the Greek Topazion, an island in the Red Sea, meaning to seek since the island was often covered in mist

Toseki

Japanese meaning "stones used for pocelain raw material (pottery stone)

Tourmaline

Singhalese turamali = originally applied to zircon and other gems by jewelers in Sri Lanka

Tremolite

locality at Tremola Valley, near St. Gotthard, Switzerland, and Greek lithos = stone

Tridymite

Greek tridymos = threefold since the crystals are often trillings

Tripoli

locality at Tripoli, Libya, in North Africa

Trona

Arabic name of the native salt

Tsavolite

locality at Tsavo National Park, Kenya , first discovered, and Greek lithos = stone

Tunellite

George Tunell (1900- ), American geochemist, U of California, Los Angeles

Turquoise

Old French turqueise = Turkish as stones came to Europe from Persia via Turkey

Tychite

in Greek mythology Tyche = the Goddess of Chance alluding to the fact that two tychite crystals in a stock of 5,000 northupite crystals were the first and the last to be found

Tysonite

S.T. Tyson who collected and supplied the specimens in the original study