Tanzanite Grading | Tanzanite jewellery

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Tanzanite jewellery has become some of the most desired jewellery in the world. Tanzanite rings, earrings and necklaces featuring these tantalizing stones are extremely fashionable, and absolutely adored by those who own them.

Tanzanite was discovered in 1967 and named after its country of origin. The popularity of Tanzanite is global, yet it is found in only one location in the world: The Merelani Hills of Tanzania, resting in the shadow of Mount Kilimanjaro.

Tanzanite is said to be one thousand times rarer than diamonds and to be the colour "that a sapphire would love to be". Tanzanite is a precious gift from the dark depths of the earth - an irresistible stone with a stylish future.

Tanzanite jewellery is created with stones which have been cut, polished and graded. The gemstones in Tanzanite rings, earrings and necklaces undergo Tanzanite grading, just as diamonds are submitted for diamond grading, which involves assessing the colour, carat, cut and clarity of each stone.

COLOUR

Tanzanite is trichroic, which means that it displays 3 different colours when viewed from different directions. These colours are blue, violet and bronze or red. When Tanzanite is found in the ground, the bronze colour dominates. Gentle heating enhances the colour that already exists within the stone, changing the brownish-red colour to Tanzanite's distinctive blue-violet. Heat treatment cannot create colour and it will not improve the quality of the stone.

Bv1+	vB1+	Exceptional
Bv1	vB1	Excellent
Bv2	vB2	Very Good
Bv3	vB3	Good
Bv4	vB4	Moderate
Bv5	vB5	Light

CLARITY

Clarity refers to the natural inclusions within the gemstone.

F	Flawless
C	Clean
S	Slight Inclusion
I	Included

CUT

Cut refers to the shape, facets and proportions of the Tanzanite. A well-cut stone will reflect light back from within the stone creating the brilliance and colour play that makes Tanzanite Jewellery so unique and desirable. Tanzanite is fashioned in various styles and shapes such as oval, square cushion, princess, trilliant, heart, octagon, round and pear.

AAA	Exceptional
AA	Excellent
A	Fine
B	Good
C	Medium

CARAT

Tanzanite's weight is measured in carats. As a Tanzanite increases in carats, so will the visibility of colour and possible inclusions, although a larger weight does not guarantee a better quality and colour. There are no fixed cutting proportions governing Tanzanite and two seemingly identical stones can have different carat weights if their depth varies.

If you are looking for custom jewellery design from South Africa, Petra Jewellery Design offers gemstone, gold and platinum jewellery design services and can assist with diamond grading and Tanzanite grading. Contact Petra Jewellery Design™ for more information.