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silver chain design Corundum with special phenomena

Diposting di oleh Kingjy

Ruby is the most expensive among all corundum gems because it contains chromium (Cr, kromium), because the output of ruby ​​is very small. Compared with sapphire, the output is only 1/5 of that of sapphire; and ruby ​​is usually very crystallized. There are not many rubies larger than 5 karat. Rubies larger than 10 carats are even rarer. This is why rubies are expensive.

Sapphire is colored by containing iron (Fe, iron) and titanium (Ti, titanium), purple corundum is colored by containing vanadium (V), while yellow and green corundum contains a small amount of iron.

Asterism has three radial star lines on the corundum cut on the egg surface. They usually appear on ruby, sapphire and black corundum. The star-like light shines on the gemstone, which is very attractive. This is because corundum belongs to the trigonal crystal system, and the needle-like inclusions in the gem are formed according to the three crystal directions: the intersection of the three rays of starlight gemstones should be in the center, the star line is obvious and flexible is the best , The high-quality star red, sapphire and corundum are invaluable, and many famous rubies are star rubies.

Color-Change will show different colors of corundum under two different light sources: yellow light and white light. Umumnya, it is the color change of blue and purple. The other is red and green, but it is extremely rare. The production of discolored corundum is not much and quite rare.

 

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