An orthorhombic, vitreous mineral frequently used as a gemstone, Al2(F,OH)2SiO4
Blog
Tag: <span>T</span>
A specific right assigned to a specific person for a certain, defined area recorded by its governing body
A silver to gray metal. Symbol, Ti
A heavy, radioactive metal. Symbol, Th
Coal used for the generation of electricity through combustion
A heavy, silvery-white metal. Symbol, Tl
A crystal form of four, equilateral triangle faces
A crystal structure having three symmetrical sides, alone or series
The period following the Cretaceous, from 65 to 1.8 million years ago
The period in time from 245 – 208 million years ago