Kyanite, whose English name is Kyanite, is derived from the Greek Kyanos, có nghĩa là “màu xanh da trời”. It also has another English name, Kisthene, which also comes from Greek, có nghĩa là “double” Và “sức mạnh”. It refers to different hardness. It shows one of the biggest characteristics of kyanite, đó là, the product is in different directions on […]
