Amazon.com: DaduoRi 1 1/4 Inch (32mm) Diamond Hole Saw with Pilot Bit, Diamond Tip 1.25" Tile Hole Saw Bits with Guiding Drill Bit Easy Drilling for Ceramic Tile, Glass, Porcelain, Marble, Granite :
Monster 1-5/8 in. Brazed Diamond Core Bit/Hole Saw for Granite, Quartzite, Marble, Concrete, Porcelain, Ceramic and Other Stones BDBP0158 - The Home Depot
3-1/8 inch Diamond Hole Saw Drill Bit Ceramic Porcelain Tile Glass Marble Granite Quartz Cutting Tip Core 3 1/8 Single Pack - Amazon.com
BLACK AND DECKER US INC Lenox Diamond 1-1/2 in. Dia. x 1.5 in. L Diamond Grit Hole Saw 1 pc. | Home Hardware