Oxides[22 from 99] Rock crystal Fragment of hexagonal- prismatic crystal    
The name, a brief visual description:
            Rock crystal
            Fragment of hexagonal- prismatic crystal
            Sample size:
            Crystal. 6*3,5*2 cm. 0,082 kg.
            Place of sampling:
            The field Tustatskoe, Mana river, West Sayan
                     
        