Find lovely strings of sapphires to add to your DIY jewelry making projects. These genuine semi precious sapphire beads work great for stringing necklaces and bracelets, or to add a drop of color to custom birthstone jewelry. Sapphire is the birthstone for September. Bead-quality sapphire beads are often opaque or semi-translucent, and vary in color from blue-green through true blue and denim blue, to blue-gray.