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A blue or green crystalline mineral consisting of aluminium silicate, used in heat-resistant ceramics.
- ‘Citrine and all the types of kyanite are good examples.’
- ‘Outside we saw large tables covered high with specimens of kyanite in quartz.’
- ‘Mineral resources include lead, gold, zircon, coal, uranium, and kyanite, but most of these are not fully exploited.’
- ‘However, most kyanite occurs as bladed crystals without well-developed terminations.’
- ‘The presence of kyanite in these rocks suggests that they may have experienced temperatures higher than the closure temperature of the mica, however.’
Late 18th century: from Greek kuanos, kuaneos ‘dark blue’ + -ite.
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