Swarovski 2402 Base Flat Back allows you add new dimensions and texture to your designs. Because they are square they nest perfectly up against one another to allow you to create mosaics and intricate patterns. It is shaped as a square with four narrow sides angling up toward the large flat top surface. The large table of the stone’s top is smooth having no facets, giving a mirror-like appearance. Swarovski 2402 Base Flat Back shown here is Crystal 10mm.