This page will contain discussion groups about Topaz, as they become available.

Topaz

This article is about the mineral or gemstone, for other uses see: Topaz (disambiguation).

Topaz 4 Carat Oval Shape Topaz Gemstone Ring Enhanced with Azotic(r)Treatment Heart Cut Sky Blue Topaz Ring

The mineral topaz is a silicate of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. It crystallizes in the orthorhombic system and its crystals are mostly prismatic terminated by pyramidal and other faces, the basal pinacoid often being present. It has an easy and perfect basal cleavage and so gemstones or other fine specimens should be handled with care to avoid developing cleavage flaws. The fracture is conchoidal to uneven. Topaz has a hardness of 8, a specific gravity of 3.4-3.6, and a vitreous lustre. Pure topaz is transparent but is usually tinted by impurities; typical topaz is wine or straw-yellow. They may also be white, gray, green, blue, or reddish-yellow and transparent or translucent. When heated, yellow topaz often becomes reddish-pink. It can also be irradiated, turning the stone a light and distinctive shade of blue. A recent trend in jewelry is the manufacture of topaz specimens that display iridescent colors, by applying a thin layer of titanium oxide via physical vapor deposition.

Topaz is found associated with the more acid rocks of the granite and rhyolite type and may be found with fluorite and cassiterite. It can be found in the Ural and Ilmen mountains, Czech Republic, Saxony, Norway, Sweden, Japan, Brazil, Mexico, and the United States.

Etymology and historical/mythical usage

The name "topaz" is derived from the Greek topazos, "to seek," which was the name of an island in the Red Sea that was difficult to find and from which a yellow stone (now believed to be a yellowish olivine) was mined in ancient times. In the Middle Ages the name topaz was used to refer to any yellow gemstone, but now the name is only properly applied to the silicate described above.

According to Rebbenu Bachya, the word "Leshem" in the verse Exodus 28:19 means "Topaz" and was the stone on the Ephod representing the tribe of Dan.

Topaz is also the birthstone of November.

Example of Heat Treated Topaz-Pink Topaz Pear Cut Ring

References

  • Webmineral
  • Mindat with location data
  • Mineral galleries

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Topaz is also the birthstone of November. Victoria may refer to:. According to Rebbenu Bachya, the word "Leshem" in the verse Exodus 28:19 means "Topaz" and was the stone on the Ephod representing the tribe of Dan. . In the Middle Ages the name topaz was used to refer to any yellow gemstone, but now the name is only properly applied to the silicate described above. Victoria (novel), an 1898 novel. The name "topaz" is derived from the Greek topazos, "to seek," which was the name of an island in the Red Sea that was difficult to find and from which a yellow stone (now believed to be a yellowish olivine) was mined in ancient times. Victoria (theatre), an international theatre group, based in Belgium [1].

It can be found in the Ural and Ilmen mountains, Czech Republic, Saxony, Norway, Sweden, Japan, Brazil, Mexico, and the United States. Victoria's Secret - a popular lingerie store. Topaz is found associated with the more acid rocks of the granite and rhyolite type and may be found with fluorite and cassiterite. Victoria National Golf Club at Victoria, Indiana. A recent trend in jewelry is the manufacture of topaz specimens that display iridescent colors, by applying a thin layer of titanium oxide via physical vapor deposition. Victoria (game), a PC RTS game released by Paradox Entertainment. It can also be irradiated, turning the stone a light and distinctive shade of blue. Victoria Cross, British medal.

When heated, yellow topaz often becomes reddish-pink. Victoria (beer) (disambiguation). They may also be white, gray, green, blue, or reddish-yellow and transparent or translucent. 12 Victoria, an asteroid discovered in 1850 by John Russell Hind. Pure topaz is transparent but is usually tinted by impurities; typical topaz is wine or straw-yellow. Victoria (carriage) An open carriage named after the queen. Topaz has a hardness of 8, a specific gravity of 3.4-3.6, and a vitreous lustre. Victoria Terminus, the former name of Chhatrapati Shivaji Terminus on the Mumbai Suburban Railway.

The fracture is conchoidal to uneven. The Vickers Victoria troop transport aircraft of the RAF. It has an easy and perfect basal cleavage and so gemstones or other fine specimens should be handled with care to avoid developing cleavage flaws. Victoria station (disambig). It crystallizes in the orthorhombic system and its crystals are mostly prismatic terminated by pyramidal and other faces, the basal pinacoid often being present. Victoria Harbour, Hong Kong. The mineral topaz is a silicate of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. Victoria (scooter), a former German motorcycle and motorscooter brand.

This article is about the mineral or gemstone, for other uses see: Topaz (disambiguation).. Victoria class submarine, a class of Canadian submarine. Mineral galleries. Lake Victoria ferry. Mindat with location data. MV Princess Victoria, a ferry which sank disastrously in 1953. Webmineral. Victoria (ship), the first ship to circumnavigate the globe.

Victoria (waterlily), the waterlily genus. (Lake) Victoria perch. Victoria Park (disambiguation). Several Victoria Peaks, see Victoria Peak (disambiguation).

Victoria Square, Adelaide, Australia. Lake Victoria, Africa. Victoria Falls, Africa. La Victoria de Acentejo, municipality in Tenerife, Canary Islands (Spain).

23,000, on the main island Mahe. Victoria, Seychelles, capital of the Seychelles, pop. Victoria, Virginia. Victoria County, Texas.

Victoria, Texas. Victoria, Minnesota. Victoria, Kansas. Victoria, Indiana.

Victoria, Illinois. Victoria, Arkansas. Belfast Victoria (UK Parliament constituency). Victoria, Newport, Wales.

Victoria, Newbury, a ward of Newbury, Berkshire. Victoria, Gauteng. Victoria, Romania. Victorias City.

Victoria, Tarlac. Victoria, Oriental Mindoro. Victoria, Northern Samar. Victoria, Laguna.

Ciudad Victoria in Tamaulipas. Victoria, Guanajuato in Guanajuato. Victoria de Durango in Durango. Victoria, Malta (also called Rabat).

Victoria, Labuan (now officially Bandar Labuan). Victoria City, one of the first British urban settlements. Victoria, Yoro. Victoria, Grenada city in Grenada.

Victoria de las Tunas, city in Cuba. Victoria-Carelton, New Brunswick. Victoria, New Brunswick. Victoria, Nova Scotia.

Victoria, British Columbia. Victoria, Ontario. Victoria, Quebec. Canadian Senate divisions that have used the name Victoria

    .

    for provincial electoral districts in Victoria, British Columbia, or for defunct federal electoral districts, please see Victoria (electoral districts). Victoria (electoral district), a federal electoral district in British Columbia. Victoria (Nova Scotia electoral district). Victoria (New Brunswick electoral district) (1867-1914).

    Victoria (Alberta electoral district). Victoria (Ontario electoral district) (1903-1966). Victoria (Alberta provincial electoral district). Victoria County, New Brunswick.

    Victoria County, Nova Scotia. Victoria, Nova Scotia, city in Nova Scotia. Victoria, British Columbia. Limbe, known as Victoria prior to 1982.

    Victoria (Australia), one of the six states of Australia. Victoria, Buenos Aires, District of San Fernando, a suburb of Buenos Aires. Victoria, Entre Ríos. Victoria Land is a region of Antarctica south of New Zealand.

    Victoria (mythology), Roman goddess of Victory. Victoria, the stage name of Lisa Marie Varon (born 1971), professional wrestler. Tomás Luis de Victoria (1548-1611), Spanish composer. Guadalupe Victoria, first president of Mexico.

    Vitruvia, mother of the Gallic Emperor Victorinus (ruled 268-270). Victoria (3rd century), a.k.a. Victoria Silvstedt. Victoria Beckham.

    Princess Viktoria of Prussia (1866-1929). Crown Princess Victoria of Sweden (born 1977). Princess Victoria Alexandra of the United Kingdom (1868-1935), granddaughter of Queen Victoria. Victoria, Princess Royal and Empress Frederick (1840-1901), her daughter, Empress consort in Germany.

    Victoria of the United Kingdom (1819-1837-1901), "Queen Victoria". Victoria (name).

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