Distinguish between several common fake diamond

Diamond is noble luxurious adornment, Mosaic natural diamond jewelry jewelry is the crown. But, diamond and rare and expensive, especially larger grain of diamond, general consumption level are no bravery of the market.


So, with cheap gem, artificial stones even glass to replace or pretend to be diamond occurs, fake diamond business is increasingly uplift come. How can ability correct understanding diamond ring? How to distinguish good this several diamond ring?

(1) glass: glass ground into fake diamond is easy to difference, because of its refractive index is low, there is a real diamond that shining color light, slightly experience a look and then know. In addition, can use white heat-trapping filled a bowl of clear water, pretend to be diamond colorless glass diffuse into the water that can't see the outline, and true diamond shadowy outline in the water is very clear.

(2) synthetic spinel: it and diamond difference is, lack of shining color light, dip it two iodide, will also outline the fuzzy, and genuine diamond profile is very clear.

(3) crystal and topaz: the two kinds of natural mineral transparent crystal, the after thinking a bit like diamonds, but lack of flashing light color. And they are "heterogeneous body", and diamonds are "isotropic body", with polarizing instrument is easy to distinguish.

(4) artificial sapphire: colorless transparent artificial sapphire wondering after can be used as a substitute for diamond. But it in "two iodide" almost disappear, and the edge of a real diamond diablo, very clear.

(5) zircon: in man-made cubic zirconia there before zircon is the best diamond substitute.

Zircon strong birefringence, i.e., it has two refractive index, and two refractive index difference between the larger. This leads to a very special optical phenomenon, when use a magnifying glass to observe consider good zircon edge surface gem, the top surface can be seen at the bottom of the surface and ridge has obvious double. And diamond because it is "isotropic body", a unique phenomenon of shadow.

(6) artificial rutile: rutile is a kind of common natural mineral, its composition is titanium dioxide, because of its refractive index (2.61-2.90) than diamonds (2.42) and high, therefore, consider a stone can appear bright dazzling flash, and can appear rainbow change, appear very beautiful. Unfortunately, natural rutile almost all is not transparent, so 1947 years to the American lead industry company first of all make the artificial rutile. The colorless transparent is used as a diamond substitute or fake product, its colorful flash more than a real diamond, often referred to as "the colorful drill" or "colored drill". But as a result of rutile has strong refractive index, so and zircon, can use a magnifying glass from top to see bottom ridge significant double shadow, so easy and diamond difference.

(7) cubic zirconia (namely "Soviet drill") : this is the first by the Soviet union launched the most ideal diamond substitute or pretend to be product, is the artificial compound, no natural mineral. Since the advent of cubic zirconia, a variety of other artificial gem raw material, use any low-standard gem substitute, and no longer to grinding counterfeiting the diamonds. This is because the cubic zirconia in refractive index, dispersion, etc and natural diamond is very close. But its hardness is low (8.5), weight for diamond 1.6-1.7 times, 5.6 -- 6, and thermal conductivity is far lower than diamond, it is still available instrument accurately distinguish with the diamond.
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