QUARTZ (Silicon Dioxide) from Sichuan Province, China. 10 centimeter tall quartz crystal.  
QUARTZ (Silicon Dioxide) from Sichuan Province, China. 10 centimeter tall quartz crystal. -- source link
#quartz#sichuan quartz
QUARTZ (Silicon Dioxide) from Sichuan Province, China. 10 centimeter tall quartz crystal. -- source link