A blue or green crystalline mineral consisting of aluminium silicate, used in heat-resistant ceramics.
- Outside we saw large tables covered high with specimens of kyanite in quartz.
- However, most kyanite occurs as bladed crystals without well-developed terminations.
- Citrine and all the types of kyanite are good examples.
Late 18th century: from Greek kuanos, kuaneos 'dark blue' + -ite1.
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