Ruby (Ruby) is a kind of Red gem, which is in the corundum mineral Group (Corundum) original tee Sapphire pure transparent colorless (Michael, 2006) but because of the changing chemical composition different colors cause, such as the Internet, instead of the element "a" sample traces 〗 〖 Cr ^ 3 "+" instead of "go", "Al 〗 〖 ^ 3 +. Make a slight mineral corundum turns red or Ruby (Ruby), there are also other colors as Zack files can result from chemical elements as well, such as Sapphire (sapphire Blue) with blue because the element Ti 〗 〖 traces "," ^ 4 "+" with "Fe" 〗 〖 ^ "2 +" by both elemental ion exchange or yellow Sapphire example bussarakam (Yellow sapphire) 〗 〖 with "Fe" ^ "3 +" The colors of the San files from clear yellow (Keller, 1982).
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