Many centuries ago people carved amulets from nephrite, they even made nephrite coins. Nephrite is in fact a fine-grained, calcium-rich, magnesium, iron, aluminous amphibole. It is composed of highly intergrown, interlocking (matted or felted texture, like asbestos or felt) crystals. Though this stone is not very hard (its hardness is from 5 to 6,5 Moh's Scale depending on the deposit), nephrite is one of the toughest gem minerals known because of the intergrown nature of the individual crystals.
Nephrite gets its name from Greek "nephros" - kidney, ancient people believed nephrite to treat kidney diseases. The history of nephrite in Russia begins in 15th century, when it was brought from Central Asia by merchants. First nephrite mine in Russia, in Sayany mountains near the Baikal lake, was found only in 18th century. If you have a questions please feel free to ask me. I will answer to you within 24 hours.
This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Rare Specimens". The seller is "russiangems" and is located in this country: RU. This item can be shipped worldwide.