Iolite, whose English name is Iolite, comes from the Greek word, 意味 "バイオレット", indicating the gem-level color characteristics. It also has several English names, one of which is Cordierite, named after the French geologist who first described the mineral in the 19th century, Pierre Louis Dental Die (PLCordier); the second, Dichroite, also from In Greek, [...]
