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Tanzanite is a rare blue-to-violet gemstone belonging to the mineral zoisite family. It is found commercially in Tanzania.
Tanzanite has a very limited known commercial source, near Mount Kilimanjaro in Tanzania, which contributes to its rarity.
Tanzanite typically ranges from blue to violet-blue. Its colour can vary depending on the viewing direction and lighting.
Yes. Natural Tanzanite is a naturally occurring variety of zoisite. Most Tanzanite available in the jewellery market has been heat-treated to improve its blue-violet colour.
Tanzanite has a Mohs hardness of approximately 6–7. It can be worn in jewellery, but it requires more care than harder gemstones such as Sapphire or Diamond.
Use lukewarm water, mild soap and a soft cloth or brush. Avoid harsh chemicals, ultrasonic cleaners and sudden temperature changes.
Tanzanite displays pleochroism, meaning it can show different colours when viewed from different directions. This is a natural optical characteristic of the gemstone.
Not necessarily. Tanzanite value depends on several factors, including colour, clarity, cut, carat weight and overall quality. A very dark stone is not automatically superior.
A professional gemological examination is the safest way to identify Tanzanite and assess whether it has been treated. A reputable laboratory report can provide information about the gemstone.
Value depends on the individual gemstone. Tanzanite, Sapphire and other blue gemstones can differ considerably in price based on colour, clarity, size, origin, treatment, rarity and quality.
Tanzanite is primarily used in jewellery such as rings, earrings, pendants and necklaces.
Tanzanite is commonly associated with December and is widely marketed as an alternative December birthstone.
Yes, but because of its moderate hardness and cleavage, Tanzanite rings should be worn with care, particularly during activities that could expose the stone to impact.
A Tanzanite can be accompanied by a gemological laboratory report describing characteristics such as identity, weight, measurements and treatment. The exact information depends on the laboratory.
Consider the gemstone's colour, clarity, cut, carat weight, treatment disclosure and laboratory documentation. Buying from a reputable seller is also important.
Tanzanite is sometimes recommended in various modern astrological practices, but astrological associations are traditional or belief-based rather than scientifically established. For an astrological recommendation, consult a qualified practitioner.
Tanzanite's commercial source is exceptionally geographically limited, whereas sapphire occurs in multiple locations worldwide. However, rarity and value of an individual stone depend on its specific characteristics.
Yes. Store it separately from harder gemstones, avoid harsh chemicals and impacts, and remove Tanzanite jewellery before strenuous activities or situations where the stone could be knocked.
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