Tanzanite Trillion Faceted Stones, AA-Grade


This AA-grade trillion-cut tanzanite features an attractive blue and purple trichroism; an ideal choice for one-of-a-kind jewelry designs. Highlight this feature by using it to create a delicate pendant with a single stone or combine it with a variety of other stones to create multicolor, mixed-stone necklace and earring designs. Tanzanite is one of the birthstones for December.

Tanzanite, a name first used by Tiffany & Co., is a blue/purple variety of zoisite, which is a trichroic gemstone—it often exhibits different colors when seen from different directions. These stones are cut to show the orientation of deep blue to violet-blue colors; the blue color is due to the traces of vanadium in the crystal structure.

The trillion cut features three curved sides, rounded corners and brilliant faceting.

  • Cutting Center : India
  • Mineral source : Tanzania
  • Stone(s) shape : Trillion
  • Material : Tanzanite
  • Stone type : Natural
  • Color : Medium Blue-Violet
  • Clarity : Eye-clean
  • Grade : AA
  • Mohs hardness : 6–7
  • Refractive index : 1.692–1.7
  • Enhancement : Heat-treated (H)
  • Specific gravity (g/cm3) : 3.35
  • Stone type : Natural

Please Note: • Care: Clean with warm, soapy water; never clean using steam or ultrasonics.
• Unless precisely calibrated to an exact size, gemstone sizes vary slightly. Rio allows a tolerance of +/– 0.1mm for gemstones 4mm and smaller.

Catalog page: 2019-2020 Gems and Findings & Display and Packaging Catalog p.710