COR-R-01 Origin: India Grade: A Dimensions: 05-10g - Approximately 15-20mm 10-20g - Approximately 20-30mm 20-30g - Approximately 30-40mm Origin: India Grade: A = good Tumbled carnelian from India Sold individually Weight options from 05-10g to 20-30g Patterns and colors may vary from one stone to another. Carnelian belongs to the microcrystalline quartz family. It is a red variety of chalcedony. Its beautiful color is due to hematite inclusions, a natural iron oxide. The intensity of its color, from red to orange, is related to its iron concentration. It is also composed of aluminum oxide and silica. This red quartz comes from low-temperature volcanic rocks.