Shaffof marvaridlarning aksariyati mineral guruhga tegishli, shaffof toshlar uchun shaffof tosh turlari. Organik qimmatbaho toshlar - bu hayvon suyaklaridan hosil bo'lgan, Sekretsiyalar yoki o'simlik qoldiqlari. 1. mineral Mineral gems are formed in the earth’s crust and have a fixed chemical composition and crystal form, and most of them […]
