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Encyclopedia > Dumortierite

Dumortierite is a glassy pink, green, violet, or blue aluminum borosilicate mineral, Al8BSi3O19OH, used in spark-plug ceramics and as imitation lapis lazuli. A block of lapis lazuli Lapis lazuli is one of the oldest of all gems, with a history of use stretching back 7,000 years. ...


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Dumortierite - Wikipedia, the free encyclopedia (208 words)
Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals.
Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions.
Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugene Dumortier (1803-1873).
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