16.40 Cts Weight Of 15.5x13.6 Mm | Natural Tanzanite Cabochons |High AAA Quality order TZ Loose Stone Gemstone|AAA Top Blue Color| SKu#NYT50

Natural Tanzanite Cabochon

Weight : 16.40 Carat

Size : 15.5x13.6 MM

Sku : NYT50

Shape : Cushion

Colour : Blue


Qualities:
1)Most Beautiful
2)Unique
3)Reasonable
4)Lucky Stone
5)Healing Properties
6)Designers Favourite
7)December Birthstone
8)All Time Favourite

Tanzanite is a violet-blue colored gemstone of the Zoisite mineral family, found only in Tanzania. It exhibits a unique phenomenon called Pleochroism in which Tanzanite displays different color (blue, violet and purple) when viewed from different angles.

Tanzanite was formed around 585 million years ago during the mid-Ediacaran Period by massive plate tectonic activity and intense heat in the area that would later become Mount Kilimanjaro. The mineral is located in a relatively complex geological environment. Deposits are typically found in the "hinge" of isoclinal folds.

Tanzanite forms as a brownish crystal and is trichroic, which means it shows three colors – brown, blue and violet – concurrently. Heating, either underground naturally by metamorphic processes, or artificially, removes the brown or burgundy color component to produce a stronger violet-blue color and makes the stone "dichroic", which means it only reflects blue and violet.[27] Rarely, gem-quality tanzanite will heat to a green primary hue, almost always accompanied by a order blue or violet secondary hue. These green tanzanite have some meaningful value in the collector market, but are seldom of interest to commercial buyers.