THIN SINTERED RIM - Features a thin sintered rim to remove less material per cut. Sintered blades are the highest quality and longest lasting type of lapidary blades. Ideal for cutting both soft and hard precious gemstones, quartz, agate, geodes, petrified wood, jasper, jade, opal, and more. ULTRA-SMOOTH & LONG LIFE - Produces ultra-smooth finished cuts. Lasts several times longer than standard super-thin, straight tooth, or plated lapidary blades. PREMIUM - Higher diamond concentration provides exceptional performance and cutting life. WATER OR OIL - Use with water for softer materials. Use with cutting oil for cutting dense, harder materials. LIFETIME WARRANTY - All Delta Diamond Products, Inc. Diamond Blades, Coring Bits, Hole Saws and Grinding Wheels include a lifetime warranty against warping, cracking, and material defects. If any diamond tool (being used under its intended use with at least 50% wear left) fails to cut or work properly, or if the bond between the diamond segment and the steel core becomes separated at any time, the diamond tool will be replaced. LGX Professional lapidary saw blades for fast, precise cutting of rare and valuable materials when waste must be kept to a minimum. Use for precise cuts on gemstones, quartz, agate, geodes, petrified wood, and jasper. Features a thin rim for producing fast, ultra-smooth cuts while lasting longer than notched rim or plated diamond blades. Use with water for cutting glass and softer, porous materials. Use cutting oil (rockhound oil) when cutting dense, harder materials.