filling cracks rev2 Lynne Yamaguchi
♦ crushed or pulverized minerals or semiprecious stones (preferably with a Mohs hardness of 6 or less) such as turquoise, azurite, malachite, chrysocolla, biotite (black mica), calcite (alabaster), dolomite, fluorite, and howlite; ♦ metal filings such as brass and copper;