Peach colored, translucent TOPAZ crystal. The terminated end is vitreous but all of the sides are adamantine. There is conchoidal fracturing on one side and the bottom. Topaz is the birthstone for November.
This piece is from the collection of Roger Maynard. Roger is a friend and was a long-time geologist with the US Geological Survey in New Mexico.
TOPAZ is an aluminum silicate with a second anion of fluorine and hydroxl. Topaz can be in either the Orthorhombic or Triclinic crystal systems depending on the F:OH ratio. Hardness is 8 on the Mohs scale. Topaz occurs in pegmatites and high-temperature quartz veins, also in cavities in granites and rhyolites. Blue Topaz is the state gemstone of Texas.
Location: Dassu, Braldu Valley, Skardu District, Gilgit-Baltistan, Pakistan
Specimen size: 1.6 x 1.4 x 1.3 inches
Specimen weight: 65 grams (2.3 ounces)
Brought to you by SIDEWINDER MINERALS
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