Tanzanite Gemstones

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Tanzanite is a type of zoisite mineral. The stone owes its origin to the volcanic processes of the Kilimanjaro stratovolcano. It is unusual and rare because it is found much less often than sapphire, a thousand times less common than diamond, and only in one place on Earth. To find 4 g of a mineral, you need to process a ton of rock.

Description of tanzanite:

  • Colors. The gem’s shade can be very diverse and very distinct from the classic blue and purple colors. Saturated blue and violet samples are usually the result of heat treatment, but not many gem laboratories can diagnose this refining factor. The most expensive color of zoisite is bright blue. There are also specimens of blue and greenish-blue color with a purple tint. Very rare and expensive colors of unrefined zoisite are: yellow, orange, pink, and green.
  • Weight. In faceted form, tanzanites can reach rather large sizes, and now it is not a particular problem to find specimens on the world market weighing more than 10 carats, which would be distinguished by good purity.
  • Price. The cost of the best samples of it sometimes exceeds 1000 USD/ct, as a rule, the average cost is about 500 USD per carat.
  • Place of mining. Only one of its deposits is known in the world – on the Merelani plateau in the Arusha province in northern Tanzania, which was discovered in the middle of the 20th century. That is why this stone has such a name.
This stone has a characteristic property – the presence of strong pleochroism. Depending on the direction of observation and illumination, different color shades appear in the stone. In this regard, a tanzanite looks luxurious in rings, pendants, necklaces. It is perfect for special occasions and ceremonial receptions, giving the image sophistication and perfection.

How to determine real tanzanite from a fake?

Due to the rarity in nature, uniqueness, and high price, imitations and fakes of tanzanite are popular on the jewelry market. The production of artificial tanzanite does not yet exist, although attempts have been made to create one. However, this does not prevent fraudsters from issuing other stones and materials as the original.  Dishonest sellers often pass off as tanzanite:
  • Doublets. The lower part of the product or stone is made of “tanzanite” glass, and the upper part is made of real tanzanite.
  • Colored glass. Analogs in the form of synthetic spinel are also possible.
  • Forsterite. It is an effective synthetic imitation of blue with the same pleochroism hardness as tanzanite.
  • Rhodolite. A purple variety of garnet.
To distinguish real tanzanite from a fake, it is enough:
  • Examine the gem from different sides, directing beams of light at it. The real one will change color – shimmer from dark purple and even burgundy to bright blue and aquamarine. This property is called dichroism or trichroism and is great for helping to distinguish a real stone from a fake.
  • Compare prices. Too low a stone price should alert you. It cannot be cheap since it has only one deposit, which means that the reserves of tanzanite are small.
  • Check documents. You should make sure that the seller has a quality certificate or consult an expert gemologist.
To surely avoid buying a fake, this stone should be bought only from reputable jewelry companies. At Gem Lovers, all stones are accompanied by passports confirming the compliance of the stones with the declared characteristics. Also, our specialists can send you photos and videos of stones in which you will see the color as close as possible to the real one. This will allow you to get a complete opinion of how the stone will be in harmony with the skin tone in your future jewelry. In addition, our company can search for your specific request. We can make any jewelry, taking into account all your wishes.