Forums Polishing difficult sunstone facet Reply To: difficult sunstone facet

  • gailbumala

    November 28, 2016 at 8:03 am

    As John said, try reversing your lap. On those particularly difficult facets, pick the direction with the least amount of damage and persist with the gentle polishing. On most, I’ve found that going to a tin oxide Ultralap (oh, horrors!) was most effective. Persisting has resulted in polish, eventually. Gentle is the key to prevent rounding of facet edges.