Diamonds, emeralds, rubies are the most precious gems of the world. Most of us know very less about this dazzling rare gem Alexandrite. The best quality alexandrites are among the most posh gemstones of the world. They are more expensive than rubies and even diamonds. The alexandrites weighing over 0.25 carat are very rare to find. The tiny melee sizes that have a good color change feature are very hard to find whatever your budget be at any price. The genuine alexandrites weighing less than 0.50 carat cost you thousandsof dollars. It is said that top-quality one-carat gems of alexandrite stone has been sold for $10,000 in Russia. These were Fine alexandrites that weigh even more than 5.00cts. These were priceless as they were extremely rare.

Ideally alexandrite is medium tone and has powerful vivid color intensity. It looks blue-green in day and rich red to purple under radiant lights in the dark. There are ones where both the colors can be seen at the same time and they are less in demand. One can also see grayish and brownish tones commonly in many Alexandrites, but this makes them prices to lower. If the stone is fine it will display distinct and striking colors and both the colors look bright and attractive.

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How to find a natural alexandrite stone

What makes alexandrite so precious is its color changing feature. A fine alexandrite should give like a teal-green color in daylight while a strong raspberry shade can be seen in the beaming lights. Most of the stones that we see aresyntheticcolor-change sapphires. They change colors from blue-purple to a purple-pink.  You can hardly see a green in them. The gemologist has refractive indices to check the genuinity of the stone.  The alexandrite changes its color owing to the presence of element called Chromium while a synthetic stone uses Vandium to effect this color change. A very different spectrum is formed with vanadium making its colors look distinct and attractive. The natural alexandrites under UV fluoresce at a much lower degree as compared to the synthetics. Under short-wave UV a yellowish-orange is would indicatively have some types of synthetic alexandrites.

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Diana Adams

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