16.40 Cts Weight Of 15.5x13.6 Mm | Natural Tanzanite Cabochons |High AAA Quality TZ Loose Stone offers 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 offers 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 blue or violet secondary hue. These green tanzanite have some meaningful value in the collector market, but are seldom of interest to commercial buyers.