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December has three birthstones: tanzanite, turquoise and zircon. Of the three, tanzanite is relatively new to the world of gems. ... The stone spans from blue to green in color. Occasionally, ...
They also replaced December's lapis with zircon and switched the primary/alternative gems for March. The American Gem Trade Association added tanzanite as a December birthstone in 2002. [ 5 ] In 2016, the American Gem Trade Association and Jewelers of America added spinel as an additional birthstone for August. [ 6 ]
This user's birthstones are Topaz and/or Citrine ... Dec. This user's birthstones are Turquoise, Tanzanite and Zircon: ... VonLumina/Birth flower December}}
The normal primary and secondary hues in tanzanite are blue and violet. Untreated tanzanite is a trichroic gemstone, meaning that light that enters this anisotropic crystal gets refracted on different paths, with different colour absorption on each of the three optical axes. As a result of this phenomenon, a multitude of colors have been ...
Calcite. Manganoan calcite (var.); Caledonite; Canasite; Cancrinite. Vishnevite; Carletonite; Carnallite; Cassiterite; Catapleiite; Cavansite; Celestite; Ceruleite ...
The earliest known emerald is a single unengraved stone mounted in a gold ring, dated circa 330–300 BC. A 3rd century BC date is far too late for emeralds to appear in Exodus and Ezekiel. [ 5 ] However, the Greek and Latin terms smaragdos , smaragdus are broad enough to include other green gemstones, the most valuable of which was the emerald.
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