high purity green silicon carbide making abrasive grinding wheels making precise sharpening stone Description:GC-GPA is a green, friable, medium bulk density ... tools, to process cast iron, hard alloy, tatium alloy and high speed steel. As loose grains, it is widely used for ... glass, stone, agates, jades and jewels.Typical Chemical Analysis:SiC 99.43%Free Carbon 0.17%Fe2O3 0.12%Physical Properties ...