Commodity Code

dioptase

http://resource.geosciml.org/classifier/cgi/commodity-code/dioptase

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
notation
01.03.10 more like this
Diop more like this
source http://www.galleries.com/Dioptase more like this
type
Resource
Concept
broader gemstones
narrower dioptase
in scheme commodity code
is primary topic of dioptase