New Enigma with Drain Quartz Kitchen Sink 31" × 20" x 8" ( 790 x 500 x 200mm) | Deep Black Finish | Top Mount, Flush Mount & Under Mount Installation | Included Accessories: Plumbing Kit | Slab Cutting Size: 380 x 440mm

They're moulded from roughly 80% natural quartz and 20% acrylic resin under high pressure, creating a dense, non-porous surface that resists scratches, dents and stains far better than pressed steel or ordinary composite sinks.