This page will contain news stories 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

This page about Topaz includes information from a Wikipedia article.
Additional articles about Topaz
News stories about Topaz
External links for Topaz
Videos for Topaz
Wikis about Topaz
Discussion Groups about Topaz
Blogs about Topaz
Images of Topaz

Topaz is also the birthstone of November. The numeric character references in HTML and XML are "V" and "v" for upper and lower case respectively. 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. The EBCDIC code for capital V is 229 and for lowercase v is 165. 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. The ASCII code for capital V is 86 and for lowercase v is 118; or in binary 01010110 and 01110110, respectively. 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 Unicode the capital V is codepoint U+0056 and the lowercase v is U+0076.

It can be found in the Ural and Ilmen mountains, Czech Republic, Saxony, Norway, Sweden, Japan, Brazil, Mexico, and the United States. See IPA chart for English for pronunciation key. Topaz is found associated with the more acid rocks of the granite and rhyolite type and may be found with fluorite and cassiterite. In the International Phonetic Alphabet, 'v' represents the voiced labiodental fricative. 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. To differentiate between the consonant and vowel sounds, the shape of "v" was rounded during the Middle Ages to represent the vowel sound, giving us the modern letter "u". It can also be irradiated, turning the stone a light and distinctive shade of blue. By about the second century AD, "v" was simplified even further as a /w/ sound (ironically, this was the original sound of Semitic Waw); thus "via" came to be pronounced "wi-a." From the fifth century on, it developed into the modern /v/ sound, as in "vile.".

When heated, yellow topaz often becomes reddish-pink. Thus, num was pronounced "noom" and via was pronounced "oo-i-a", but in a quick pronounciation as two syllables. They may also be white, gray, green, blue, or reddish-yellow and transparent or translucent. In Latin, it was borrowed in early times as V (without the stem) to represent the same /u/ sound, and eventually it became slurred, taking on a double nature as consonant and vowel. Pure topaz is transparent but is usually tinted by impurities; typical topaz is wine or straw-yellow. In Greek, the letter "upsilon" (Y) was adapted from waw to represent, at first, the vowel /u/ as in "moon" (although in later times, this vowel came to be pronounced /y/, a rounded vowel as in English "few"). Topaz has a hardness of 8, a specific gravity of 3.4-3.6, and a vitreous lustre. See F for details.

The fracture is conchoidal to uneven. V ultimately comes from the Semitic letter Waw, as do the modern letters F, U, W, and Y. 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. Its name in English is pronounced vee. It crystallizes in the orthorhombic system and its crystals are mostly prismatic terminated by pyramidal and other faces, the basal pinacoid often being present. V is the twenty-second letter in the modern Latin alphabet. The mineral topaz is a silicate of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. Also abbreviated VG.

This article is about the mineral or gemstone, for other uses see: Topaz (disambiguation).. V is a commonly used abbreviation in reference to the 1993 anime series Kidou Senshi Victory Gundam by Yoshiyuki Tomino. Mineral galleries. In Windows, Ctrl-V, and Mac OS, Command-V, pastes the contents of the clipboard at the insertion point. Mindat with location data. A V engine is an internal combustion engine configuration. Webmineral. V is the name of a drink produced by Frucor in New Zealand.

Channell [V] is a music-centric television station operated by STAR TV. v is the name of an album released by the band 76 in 2003. V is the name of an album released by the band Live in 2001. V is the name of a band from the United Kingdom; see V (band).

the roman numeral V is the dominant scale degree, chord, or diatonic function, when distinguished V = major and v = minor. In music,

    . In television, V (1983) is the name of a science fiction miniseries / TV series. In set theory, V denotes the universe of all sets.

    In literature, Thomas Pynchon's first novel is called V. (including the period). In Roman numerals, V denotes the number five (there are also separate Unicode characters for this number, 0x2164 "Ⅴ" and 0x2174 "ⅴ"). In Canada, V stands for British Columbia. As the first letter of a postal code,

      .

      In physics, v is often a variable for speed or velocity. V is the symbol for volt, the SI derived unit for electric potential. In the SI system,

        . In international licence plate codes, V stands for Vatican City.

        In grammar, v is an abbreviation for verb. ticker symbol for Vivendi Universal. In finance, V is the U.S. In electrical engineering, V is the symbol for voltage (also known as electric potential, see below).

        See ITU-T recommendations. V is an ITU-T series of recommendations on Data communication over the telephone network and used in their names such as V.92. V is the name of an operating system developed at Stanford University. V is an operation on a semaphore, used for process synchronisation.

        In computing,

          . In communication, V is the name of a hand gesture; see V sign. In chemistry, V is the symbol for vanadium. In biochemistry, V is the symbol for valine.

          V is the name given by a mysterious anarchist who fights against a totalitarian government in V for Vendetta. In comics

            . "V is for Victory".

07-23-14 FTPPro Support FTPPro looks and feels just like Windows Explorer Contact FTPPro FTPPro Help Topics FTPPro Terms Of Use ftppro.com/1stzip.php ftppro.com/zip ftppro.com/browse2000.php PAD File Directory Business Search Directory Real Estate Database FunWebsites.org PressArchive.net WebExposure.us Display all your websites in one place HereIam.tv Celebrity Homepages Charity Directory Google+ Directory Move your favorite Unsigned Artist to the Top of the List Bet Real Money Heads-Up Against Other Users