A look at Cosmos Gems a manufacturer, importer, and exporter of Diamonds, precious, and semi precious stones.

Pro-Quality 20-Piece Diamond-Point Bit Set for Rotary Tool - Glass, Stone, Ceramic

Professional Quality, 1/8 -Inch Shank, 180 Grit. Includes 20 assorted shapes covered with diamond particles. All bits have 1/8 -Inch shanks and come in convenient plastic holder. Excellent for fine detail work, cutting, engraving, carving, touch-up and finishing. Use on wood, jade, ceramic, glass, hardened steel, semi-precious stones and other hard materials.