Crystal Quartz
Quartz
Quartz is either natural or artificially produced. This synthetic quartz has the same refractive index and composition as natural quartz, but it has fewer impurities and is more pure than natural quartz, so it is also used in industrial products such as quartz watches.
1pc Size:Approx 6x6x3.5mm(+/-0.5mm )
Hole size :Approx 0.6-0.8mm