http://resource.geosciml.org/classifier/cgi/commodity-code/sapphire
definition | Sapphire is a blue gemstone variety of the mineral corundum. | ![]() |
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notation |
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source | http://en.wikipedia.org/wiki/Sapphire | ![]() |
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type |
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broader |
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in scheme | commodity code | |||||
is primary topic of | sapphire |