How to... Buy tanzanite
Colour is the most important aspect to consider when buying
tanzanite. Tanzanite that is blue rather than purple is more
expensive and the colour is most intense in sizes above 10
carats. Like diamonds, tanzanite is extremely beautiful if
cut well, so special attention should be given to the overall
proportions. The cut of tanzanite is categorised by quality
and classified as A (fine), B (good) or C (medium). A (fine)
tanzanite is usually clean with very high clarity under magnification.
Stones described as 'flawless' or 'clean' may contain minor
inclusions that do not detract from the perfection of the
gem to the human eye. Stones described as 'slight inclusion'
or 'included' contain tiny inclusions that can be detected
by the human eye. A tanzanite's beauty, rarity and value depend
on the interplay of these factors and a final determination
should always be made in consultation with a Tanzanite Foundation
Preferred Jeweller. Only stones that meet the stringent quality
standards of the Tanzanite Foundation are selected for inscription.
A unique microscopic number is inscribed onto each stone,
which can be viewed at the point of purchase. A certificate
of authenticity, corresponding with the inscribed number,
serves as a guarantee of ownership and documentation of grading.
For more info, call the Tanzanite Foundation on (011) 214-1000.
Clean tanzanite
Tanzanite should be cleaned with warm, soapy water and a soft
bristle brush. Because it is a delicate stone, it, should
not be cleaned in an ultra-sonic jewellery cleaner or be exposed
to acid or sudden temperature changes.
Care for tanzanite
Tanzanite is a soft stone and although it can be worn every
day, care should be taken to protect it from knocks, pressure
and extreme temperature changes. Never wear your tanzanite
during strenuous activity.
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