Tanzanite Grading

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-International-color-chart
COLOUR

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.

CLARITY

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.

    • IF – Internally Flawless

    • VS – Very Small Inclusion                 (slightly visible under 6x)

    • VVS – Very Very Small                     Inclusion (not visible under 6x)

    • I – Included (clearly visible               to the eye)

    • SI – Slight Inclusion (clearly             visible under 6x)

Tanzanite-International-clarity
Tanzanite-International-carat-weight

(Size not to scale)

CARAT WEIGHT

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.

UNIQUE FEATURES
Rare African Mystique
Tanzanite is 1 000 times rarer than diamonds. Tanzanite’s only known source in the world is along a 5km strip of land near Mount Kilimanjaro, northern Tanzania.
TANZANITE CERTIFICATION
Assurance in Quality & Authenticity
All tanzanite is certified in accordance with the Tanzanite International Grading Standard, reassuring the owner of its quality of colour, clarity and cut as well as its authenticity
BUYING GUIDE
Learn the important factors to consider
Before you decide to purchase an exquisite loose tanzanite or a unique creation make sure to follow our buying guide.
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