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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
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Resource original
Concept original
broader original
narrower dumortierite original
in scheme commodity-code original
is primary topic of dumortierite