Tanzanite is graded according to Colour, Clarity and Carat weight. The higher the combination of these characteristics, the more rare and valuable it is. There is also a further consideration; Confidence that comes with the certification that guarantees colour, clarity and exceptional quality.
Tanzanite has what many would consider the finest blue hue in the world of gemstones. Tanzanite is one of the only trichroic gemstones known to man, meaning it has the ability to display shades of blue, violet and red. Good quality Tanzanite has a deep royal blue or violet colour. Colours range from rich royal blues or vibrant violet to paler watery shades. The colour dominance depends on whether the gem is cut and polished from the long or the short axis of the crystal shaped rough tanzanite; and the more intense the colour the better the quality.
The clarity of a Tanzanite is graded in a similar manner to that of diamonds, and range between Internally Flawless (IF), and Included. Clarity measures the incidence of natural inclusions found in a tanzanite stone.
(Size not to scale)
Carat refers to the weight of a tanzanite and other gemstones. A carat is a unit of measurement equal to 0.2grams (200 milligrams). Large tanzanite (over 3 carats) is rarely found in nature, so they are more valuable than smaller tanzanite.
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