Natural Stone Resources QRTSUNWOO1224G-3BNPC 12" x 24" Sunwood Single Bullnose Quartzite Pool Coping. Natural Stone Resources is a premier importer & distributor of quality natural stones from around the world. Whether you're looking to add coping to your masonry walls, columns, landscape, steps, or pools, the Sunwood Quartzite Bullnose Coping is a beautiful choice. Includes a bullnose edge on one 24" side.