Franke PKG11031OYS Peak Granite Undermount Single Bowl Kitchen Sink, Oyster Franke granite sinks are made from 80% quartz, the hardest component of granite The material is bonded using high-quality Acrylic resins Wonderfully easy to clean beauty is even better when its durable These tough granite sinks are scratch, heat and stain resistant A little bit of daily care will keep your granite sink looking like new