How to identify artificial sapphires
Sapphire symbolizes the harvest of autumn, so it is also called the birthstone of September. Soymilk sapphire has always been seen as a symbol of loyalty and steadiness. Like sapphire, sapphire is a kind of gemstone. Its main chemical composition is aluminum oxide, which belongs to the hexagonal system. The crystals are mostly short and thick hexagonal double cones or barrels. Sapphire symbolizes the harvest of autumn, so it is also called the birthstone of September. Soymilk sapphire has always been seen as a symbol of loyalty and steadiness.
It is important to distinguish between artificial sapphires and natural sapphires. The main chemical composition, hardness, density and dichroism of artificial sapphire are the same as natural sapphire. The difference between the two is mainly the fine features inside the gemstone. The natural sapphire color is not uniform, there are flat ribbons, and there are many inclusions. .
The artificial sapphire has a uniform color, and the interior is basically flawless. Sometimes there are round bubbles. The water can be discerned by careful observation.
The artificial blue spinel is bright, uniform, low in hardness, low in density, non-dichroic, and red under the color filter.
Artificial blue glass is easy to distinguish from natural sapphire. The glass has low hardness, low density, low refractive index, small round bubbles, no dichroism, and red color under the color filter. The blue spinel is uniform in color, homogeneous and has no dichroism. Its hardness is 8, the density is 3.6, and the refractive index is 1.72, which is lower than natural sapphire. The blue tourmaline color with green tone has a horizontal split and an empty tubular gas-liquid inclusion body with a hardness of 7, a density of only 3.1, a refractive index of 1.64, and also lower than sapphire. The cordierite blue is gray, the refractive index is low, the light density is light, only 2.59, and the trichromaticity is obvious.
Similar blue gems include blue cone, tanzanite, and kyanite.
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