Corundum variety sapphires / CAS-G 17298, 16170, 16158, 16178Locality: Sri LankaCollection: Inverteb
Corundum variety sapphires / CAS-G 17298, 16170, 16158, 16178Locality: Sri LankaCollection: Invertebrate Zoology and Geology, image © California Academy of Sciences -- source link
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