Aquamarine (gemstone) | Wikipedia audio article
Channel: wikipedia tts
Date: 03/07/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Beryl


00:00:38 1 Etymology
00:01:29 2 Deposits
00:03:09 3 Crystal habit and structure
00:04:28 4 Varieties
00:04:37 4.1 Aquamarine and maxixe
00:07:28 4.2 Emerald
00:10:49 4.3 Golden beryl and heliodor
00:11:49 4.4 Goshenite
00:12:40 4.5 Morganite
00:14:26 4.6 Red beryl
00:17:06 5 See also



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SUMMARY
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Beryl ( BERR-əl) is a mineral composed of beryllium aluminium cyclosilicate with the chemical formula Be3Al2Si6O18. Well-known varieties of beryl include emerald and aquamarine. Naturally occurring,  hexagonal crystals of beryl can be up to several meters in size, but terminated crystals are relatively rare. Pure beryl is colorless, but it is frequently tinted by impurities; possible colors are green, blue, yellow, red (the rarest), and white. Beryl is also an ore source of beryllium.