2 pound White / Light Yellow Cerium for polishing Rocks and GlassnHigh Purity Optical Grade, for a beautiful, hard shine on agates, jaspers, thundereggs, cabochonsnUse in Flat Laps, Rock tumblers, Wheels with felt, leather, muslin, or compound discs and belts.nOptically graded, excellent polish. This has been unaffordable for more than ten years but now itu0026#39;s BACK!nThis polish would also be excellent for auto repair / windshield scratchesn