TURMALIN

TURMALIN, yak nav mineralest az guruhi alyumosilikathoi bor (V) dor. (Na,Ca) (Mg, Ge, Li)3 Al6 Si6O18] [VO3]z(ON) 4.

Khelhoyash:
sherl (Turmalini ohandor), siyohrang; dravit — magneziali, bur; rubellit — mangandor, gulobi; indigolit, nilobi va gayra; Turmalini polikhromi. Sakhtiash 7—7,5, zichiash 2,9—3,3 g/sm3. Kristallhoyash qalamchamonand. Hamchun ashyoi piroelektri istifoda meshavad. Kristallhoi shaffofi Turmalin (rubellit, yoquti kabud va gayra) sangi qimatbaho meboshand. Turmalini suni niz hast.