November 12, 2009

Tanzanite Fast Facts

Posted in birthstones, gemologist, gemstones, jeweler, jewelry, jewelry design, rose diamonds, Uncategorized tagged , , , , , , , at 9:24 pm by rosediamonds


Tanzanite Fast Factscushion-cut-tanzanite
  • Tanzanite was discovered in 1967.
  • The exotic violet gem from Tanzania was made popular by Tiffany and Co.
  • It was originally meant to be a sapphire alternative.
  • While a 6 to 7 on the Mohs Hardness Scale, tanzanite has fair to poor toughness. (translation: it can cleave/split easily and is sensitive to thermal shock)
  • Almost all tanzanite is heated to improve its color
  • Most Tanzanite begins as unglamourous brownish zoisite
  • Fluctuations in supply, controlled by the Tanzanian government, make the price of tanzanite fluctuate
  • Ideal Tanzanite Color is a Pure Blue that rivals Sapphire or a vivid Violet-Blue
  • Most commercial tanzanite is purple
  • A synthetic tanzanite has not been created, but an imitaions exist–Synthetic Forsterite & Blue Coranite (Glass & purple YAG)
  • Fine Tanzanite can rival diamond prices.
  • There has been an effort to make Tanzanite an alternative to Blue Zircon for December’s Birthstone




  1. […] More:  Tanzanite Fast Facts « Rosediamonds's Blog […]

  2. kathyoinspirations said,

    I like the idea of changing the December birthstone…the tanzanite stone is stunning…much better than the blue zircon. Thanks for sharing this tidbit. I know what I want for my birthday! 🙂

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