The Formation of Ruby

The main chemical composition of the ruby contends a certain part of chromium hemitrioxide, the percentage of the chromium hemitrioxide in the dark red and minor transparent gem is 4%. The color of the ruby is asymmetrical, we often can see the flat and straight color band, the ruby usually crystallizes into hexagonal prism, which is plane at the top side, belonging to hexagonal. There is no cleavage, the fracture takes on conchoid, the hardness is 9, the ruby is very tough, can bear the strong impact, most of them have annular striation, poly chip double crystal growth, it is very rare for the quality ones which have cleft. The proportion of the ruby is 3.95 ~ 4.05, usually is 4.00, the transparency is from transparent to opacity, the fracture takes on glass gloss, the polished surface takes on glass to adamantine luster. Very few rubies have the effect of change of color like the alexandrite, from blue to red purple, sometimes from green to reddish brown. The ruby inclusions also include zircon, spinel, ground mica, hematite, garnet, corundum crystals and grain, also often have gas-liquid inclusion, spreading like fingerprint. The ruby has pleochroism, dark purple and orange, pink, red-purple, dark red, bright red and pigeon blood red, the red colors of the ruby we usually see are light, only the pigeon blood red is the best.

The ruby takes on dark red seen through the color filter, the ruby will not melt in the high heat of the blowtorch or gem torch. It will turn green cooling down from high temperature, it will turn back to the red color once it has cooled off, it is very hard to dissolve into the acid. The ruby is often produced from the high temperature and rich aluminum calcium deficiency, as the formation of the geological environment is very special, the perfect ruby in nature, especially the large one, is very rare in nature.

10x8~15mm Hot Red Ruby Necklace Stud Earrings Set

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