出典:Wiktionary
出典:『Wiktionary』 (2017/04/08 21:36 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/24 06:38 UTC 版)
Taaffeite (BeMgAl4O8, pronounced 'TARF-ite') is a mineral named after its discoverer, Count Edward Charles Richard Taaffe (1898–1967) who found the first cut and polished gem in November 1945. As such, it is the only gemstone to have been initially identified from a faceted stone. Most pieces of the gem, prior to Taaffe, had been misidentified as spinel. For many years afterwards, it was known only in a few samples, and is still one of the rarest gemstone minerals in the world.