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dumortierite

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

definition Dumortierite is a boro-silicate mineral that is used as a popular ornamental stone. It has a deep violet to blue color that is very attractive and unusual. Although it is not used as a gemstone due to a lack of clarity, it does have good hardness and a bright color. more like this
notation
01.03.11 more like this
Dum more like this
source http://www.galleries.com/Dumortierite more like this
type
Resource original
Concept original
broader
http://resource.geosciml.org/classifier/cgi/commodity-code/gemstones original
narrower dumortierite original
in scheme commodity-code original
is primary topic of dumortierite