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18K white gold ring, set with a stunning 2.04 carat fancy tanzanite with a golden hue. Decorated with two "wings" of diamond.


Rare Green, Yellow, Orange and Pink Tanzanite

Tanzanite is one of the world's best loved and most renowned gemstones. Its incredible rarity and beauty have given it a meteoric rise up the ranks in the gemstone kingdom.

One of the best kept secrets of the Tanzanite trade is the incredibly rare occurence of fancy color Tanzanites that are occasionally discovered. Some people have heard of green Tanzanite but the wonders of oranges, yellows and the very rare pinks are not known to most people. Their very rarity and the fact that they are so seldom found have made them the preserve of collectors and Tanzanite enthusiasts who are well informed.

Geological History

The Merelani Mining area beneath Mount Kilimanjaro is the only known source of Tanzanite in the world. This makes the stone considerably rarer than Diamonds and one with a finite resource. It is believed that the eruption of Mount Kilimanjaro was responsible for setting off the unique set of conditions in the earth which caused Tanzanite to form.

Whilst the formation of blue Tanzanite was caused by the presence of Vanadium in the earth, the presence of other minerals caused a very rare occurrence of other colors to form too. These wonderful “fancy color Tanzanites” (as they are known in the trade) are very seldom found as the minerals that were responsible for their color were only present in minute quantities at the time of formation. Crystals with colors other than blue include pink, orange and a variety of greens. They are very rare and much sought after gemstones.

This gorgeous Fancy Tanzanite is one of a very few produced in a very small window of the earth's history. It was formed 500 million years ago. The host rock it formed in are late Proterozoic metasediments that were originally a series of sands and clays rich in organic matter with elevated levels of uranium, vanadium and aluminium rich minerals. These sediments were highly weathered and deposited in a lake.

During and after the Pan-African tectono-thermal (mountain building) metamorphism a release and migration of hydrothermal fluids took place. The result was the deposition from these fluids of calcium, magnesium, vanadium, uranium, strontium and Zinc as well as heavy rare earth elements Co2 and SO3 along the Lelatema fault zone into chocolate tablet shaped boudin structures.

This rare Fancy color Tanzanite was amongst a number of crystals that formed in this structure as a result of the enormous geological events that formed the mighty Mount Kilimanjaro. It lay there for hundreds of millions of years until it was discovered by independent Tanzanite miners as they explored deep into the earth's surface. Cut by our master cutters to release its inner fire. Five hundred million years after its conception this lovely, rare crystal finds itself in human hands and set in a lovely ring designed by Orloff of Denmark.

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