1 Ounce Inlay Material White Mother of Pearl Shell Blanks 1.50 mm thickness the blanks are flat and good "at least" in one side. White, used in Vintage Guitar, Banjo and Mandolin Inlay ,Furniture making, Mosaic Art and Jewelry manufacture. A great low cost source of white material for mosaic art works. They are in various sizes (some of them are around 0.50" X 1", some are bigger and some smaller ), which are well represented by the photograph. These are Natural White Mother of Pearl and are specially selected pieces to have uniform color as possible throughout, they polish to a beautiful finish.