Show dark amaranth or amaranth, granule structure, lump is tectonic, quality of a material is close harder, main and mineral component is dolomite, limonite to wait.

• 呈暗紫红色或紫红色,细粒结构,块状构造,质地细密较坚硬,主要矿物成份为白云石、褐铁矿等。