A mineral topaz is a silicate of aluminium and fluorine with the chemical formula (AlF)_DeuceSiO_Four. These are orthorhombic and its crystals are mostly prismatic terminated by pyramidal & more faces, a radical pinacoid typically existence present. It has an easily & hone radical cleavage so gemstones or other ticket specimens should become handled by having care to make sure your not underdeveloped cleavage flaws. A fracture is conchoidal to uneven. Topaz has the hardness of 8, a specific gravity of 3.Four-Three.Six, & the vitrified lustre. Pure topaz is transparent however is ordinarily tinted by impurities; average topaz is wine or even straw-yellow. It might too become white, gray, green, blue, or reddish-yellow and transparent or even semitransparent. Whilst heated, yellow topaz typically becomes reddish-pink. It can too exist as irradiated, turning the stone a weak & distinctive shade of blue. Mystic Topaz™ is made by Azotic Coating Technology, Inc., a laboratory that deposits a thin layer of titanium oxide (via physical vapor deposition) on natural topaz which results in optical interference patterns that showcase a rainbow of colors.

Topaz is noticed associated sustaining a other psychedelic rock of the granite and rhyolite type and can be observed sustaining fluorite and cassiterite. It may be incurred in the Ural and Ilmen mountains, Czech Republic, Saxony, Norway, Sweden, Japan, Brazil, Mexico, and a United States.

A title "topaz" is from either a Greek topazos, "to seek," which was a title of an island in the Red Sea that was difficult to buy & from either which the yellow stone (currently believed to exist as the xanthous olivine) was mined in ancient days. In the Middle Ages a title topaz was wont to refer to any yellow stone, however at present the name is lone properly applied to the silicate described above.

Topaz is as well a birthstone of November.

Look at as well: List of minerals

bg:Топаз cs:Topaz de:Topas et:Topaas es:Topacio fr:Topaze (minéral) lt:Topazas hu:Topáz nl:Topaas ja:トパーズ pl:Topaz pt:Topázio ru:Топаз sv:Topas