Made of premium quality polished G5 Granite; black with white speckles.No ingredients will escape thanks to its tall 4" walls. This mortar is elegantly designed, heavy, well-balanced and suitable for rigorous pounding and grinding. The two-tone pestle is heavy yet comfortable and it crushes, grinds and mixes herbs or spices with ease. Its natural non-porous quality allows for extracting the oils from herbs and spices without being absorbed into the stone.