Kyanite, whose English name is Kyanite, is derived from the Greek Kyanos, co oznacza “niebieski”. Ma również inną angielską nazwę, Kisthene, which also comes from Greek, co oznacza “double” I “wytrzymałość”. It refers to different hardness. It shows one of the biggest characteristics of kyanite, to jest, the product is in different directions on […]
