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definition Dioptase is a very beautiful mineral and it is one of the few minerals that can challenge the peerlessness of emerald's deep green. Unfortunately it is rather soft (for a gemstone) and has good cleavage and therefore is not usually cut as a gemstone. more like this
01.03.10 more like this
Diop more like this
source more like this
Resource original
Concept original
broader original
narrower dioptase original
in scheme commodity-code original
is primary topic of dioptase