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Ruby in the world of minerals is known as corundum, the crystal structure consists of aluminum oxide. Ruby and sapphire are precious varieties of corundum. After diamond ruby is the hardest stone. Most natural rubies have internal defects, gemstone jewelry. Ruby color ranges from red to brown. The most valuable are the colors of "pigeon blood" - a pure red color with a slight purple tinge. Price. As other gems, the ruby price is determined based on the richness and beauty of color, purity and free of defects. Usually ruby quality can be identified with the naked eye, and the inclusion examined only under loupe. Rubies weighing under 2 carats are more common, while the stones over 5 carats, it's a scarce commodity. A top-quality rubies are rare, regardless of their size. The most expensive are rubies mined in Upper Burma, they have a distinctive shade of "pigeon blood". Burmese ruby ??weighing 5 carat can cost ten times more the price of the same quality rubies from Thailand. With what can be confused Rubies? Almost all red stones in cheap jewelry stores are synthetic corundum. Tips on choosing: don't limit the stone examination only under floodlights. In daylight, just a stone from Burma seems as it lit from inside, flickering, like a hot coal. Stones exported from Thailand, as a rule don't have such a "fire." Rubies from Sri Lanka will seem to you in the light of lamp only stones with pale pink color. Summary: the most successful investment represent Burmese rubies with ??rich "pigeon blood" color, weighing 1 carat, with class A faceting, with inclusions visible only with a magnifying glass buy ruby jewelry.
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