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Chilblains (/ËtÊÉªlbleÉªnz/) â also known as pernio, Chill Burns and perniosis â is a medical condition that occurs when a predisposed individual is exposed to cold and humidity, causing tissue damage. It is often confused with frostbite and trench foot.
A greenish, Cr(III)-bearing variety of elbaite. Cuprian Elbaite: A Cu-bearing variety of elbaite. This material, when used as a gemstone, has been assigned a new formal commercial trade name by the Laboratory Manual Harmonization Committee (LMHC), a group of 7 gemmological laboratories worldwide - ParaÃ­ba Tourmaline,... ParaÃ­ba Tourmaline