(2) Artificial gems A crystalline body or an amorphous body that is manufactured artificially and has no known counterpart in nature. Masalan, Sun'iy strontium Titanat, Ushbu mineral hozirgacha tabiatda topilmadi. Sun'iy marvaridlar so'zi so'z bilan qo'shilishi kerak “sun'iy” Material nomidan oldin, shunday […]
