An orthorhombic, vitreous mineral frequently used as a gemstone, Al2(F,OH)2SiO4
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Category: <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 weight equal to 373.2509 grams
A weight equal to 31.1034768 grams
A volcanic eruption subject to glacial exposure at surface
The state of reduced clarity of liquid, due to the concentration of suspended sedimentary or other particles
A large tunneling machine capable of drilling large tunnel and room sizes passages in solid rock