identify Sapphire Jewelry

Natural sapphire color is often uneven, with most of the growth of straight lines. Artificial sapphire color, while its growth pattern for the arc zone, often seen in vivo with bread crumbs-like or bead-like bubbles.Natural sapphire is also obvious dichroism, look for the blue from one direction, from another direction, compared with blue-green. Coloration of precious stones and other natural sapphire different basis can be identified.
In addition, the easiest way to free determination of hardness, natural sapphire topaz carved out in signs, and other blue topaz stones carved out of difficult to trace, so buying jewelry, if no instruments around, as long as there is a topaz sometimes solve some problems.
The English name Sapphire Sapphire, from Latin Spphins, meaning blue. Mineral name sapphire corundum, corundum family of minerals are. Will ruby gemstone industry at present, the other colored gem corundum china gemstone wholesaler referred to as sapphire.
Chemical composition of sapphire aluminum oxide (Al2O3), which with the trace elements of titanium (Ti4 +) or iron (Fe2 +) and blue. Trigonal system. Crystalline form often has tubular and short prismatic, plate, etc., geometry and more granular or compact block. Transparent to translucent, shiny glass. Refractive index 1.76-1.77, birefringence 0.008, two-color strong. Non-homogeneous body. Sometimes has a special optical effects - Star effect. 9 hardness, density 3.95-4.1 g / cc. No cleavage, fracture management and development. Under certain conditions, can produce a beautiful six-shot stars, known as the "Star Sapphire."
Sapphire can be divided into blue sapphire and Chromic (non-blue) sapphire. Colors of Indian Industry "cornflower blue" as the best. Sapphire is said to protect from harm the king and the monarch, the "King Stone" said. International gem industry to sapphire as the "September birthstone," a symbol of love, loyalty and faithfulness. Sapphire is one of the world's five precious stones high.
Sapphire evaluation and selection. China jewelry supplier evaluation and selection of the sapphires factor is color, weight, transparency and clarity. Sapphire is the biggest characteristic color is uneven, double-crystal polymer film is not developed, two-color strong. Myanmar's sapphire production area, with bright blue (titanium coloration), which with the inclusion, can produce six or 12 shot shooting stars. India, Kashmir sapphire, was Cornflower blue is purple indigo microstrip, bright colors, is a high-quality sapphire. Sri Lanka, Thailand, China, Australia's sapphire production is also distinctive. Sapphire has a brittle, wear should be avoided beat, bump.
In nature, and emerald green transparent gem similar types of many of the more common are emerald, tourmaline, fluorite, peridot, garnet and zircon, etc., which look exactly like the emerald is confusingly tourmaline, fluorite and jade . To the naked eye, were tested generally translucent green jade, often mat porphyritic texture, and quality emerald transparent crystal. Emerald hardness 7.5-8, and fluorite low hardness of only 4. Emerald smaller proportion, and china gemstone of fluorite, tourmaline, jade were relatively large proportion. Zircon is strong and has a clear dispersive double shadow.
In addition, similar to the artificial and natural emerald emerald green glass, the biggest difference between them is that the vast majority of natural emeralds are defective, or package body, and visible dichroism. Of course, the best use of the distinction between strictly correct Refractometer, polarized light microscopy identification of equipment.

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