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Ruby stones can have more than 400 tints of red, rose petals, poppies - pink and red, even purple, and brown. Ruby is a very rare gem. Natural stones weighing 5 carats (1 gram) are very rarely seen in jewelry stores. The most valuable rubies are from Burma, Thailand, Sri Lanka and Vietnam. Their color is like a candle flame or pigeon blood, buy ruby necklaces. If according to Indian mythology ruby takes the third place from 9 of the stones main places (after diamond and pearl), according to Christian tradition ruby lead. For centuries, with ruby were decorated weapons. Admiring ruby stone, the man perceives color with a variety of shades and shapes of stone. Ruby crystals possess a degree of gloss, which don't have other transparent stones, except diamonds. At the same time ruby shine can be different and vary from diamond to glassy. Unusually are valued "clean" rubies, with thick red color, of so-called pigeon blood color, with a light purple tint, more purple and orange tint reduce the cost of stone. According to the hardness, ruby is second only after diamond, but the hardness of the stone can vary. This take into account professional jewelers in process of cutting. Despite its hardness, ruby ??is fragile and requires carefully handling, cutting and pasting into a frame of stone jewelry, ruby bead necklace. It happens that in a ruby ??crystal are present micro-inclusions, so called "needles" of rutile ( titanium dioxide mineral), the thickness of which is comparable to the wavelength of light. "Needles" give to ruby stone a soft silky luster and iridescence. This "needles" creates the effect of cat's eye or asterism. These star-shaped rubies-with asterism are very highly regarded. Rubies with vague asterism are also called "Girasole", or "ruby cat's eyes." In rubies asterism effect is very rare phenomenon. Marked asterism were mostly in rubies mined in Thailand and Sri Lanka, and represent a six-star.
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