Stones including diamond, legendary luminous pearl, opals and emeralds, rubies, sapphires and other, expensive, artificial stones although beautifully produced, but belong to the fake jewel like. Generally speaking, fake gems can be divided into four categories, one is plastic, glass imitation products; two is similar to the gem stones bonded imitation; three is a chemical synthesis of diamond (such as alumina); four is to add the pigment to the transparent mineral, posing as a gem. Here are some identification methods.
One, appearance: true gem has clear natural lines, there are clouds, there is a crystal feature; false gem no natural texture, no clouds, no crystal characteristics.
Second, the heat transfer: a real gem heated rear heat slowly, touch has a cool feeling; fake stones heated rear heat fast, touch are thermal.
Third, use a magnifying glass observation: in the surface and in the interior of the fake jewel has curved spiral rhyolite, round or oval bubbles visible fracture casting marks, etc., while the real gems without this phenomenon.
Four, hardness: diamond hardness of 10 degrees, ruby, sapphire, 9 degrees, and lower hardness of the gem. In does not affect the appearance of the site, with diamond draw the gem, if you can leave scratches the diamond is real; also can be the jewel in Topaz (hardness of 8) to draw, if left traces of real jewels.
Five, color: red, blue, green, orange, purple, yellow and a variety of colors. Such as ruby, red with the best pigeons, natural stones with a magnifying glass, there are inclusions and cracks; and the artificial gem is particularly pure, no impurities, bubbles, there is a "do".
Six, multi color: true gem has a color. Such as sapphire in the sun, blue, blue, blue, blue, green, false gem.
Seven, fire roasted: real jewels in the fire roasted in can not be broken; fake jewel once roasted, when the temperature rises to 90 degrees Celsius will rupture may is fake.
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