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can tell me the name of this red stone in the attach picture?

0 votes

I have two natural red gemstones (picture attached) , I sent one of them to gemologist and he tested it but could not give me a definite answer, Attached is the lab test results , can you help me to know the name of these gemstones????


asked May 24, 2017 by m.jab (120 points)

1 Answer

0 votes

Red corundum is ruby.

Al2O3 is corundum, red corundum is ruby, blue is sapphire

SiO2  is silicon dioxide, usually associated with silicates like quartz, purple quartz is amethyst.

So I am not a gemologist, but I would say the stones are mostly ruby but mixed with other minerals, those are impurities, trace elements or inclusions like titanium oxide, ferrous oxide, chromium oxide, indicated by the various concentrations. I am not an expert but it seems to me it is more than half ruby. I do not know if industry standards are applicable. I do know for a stone to be considered an agate, it has to be 50 percent agate. By that standard, it is a ruby.

answered May 26, 2017 by Weasel (42,920 points)