Possibly the most common rock found in Hawaii homes. A little short of the black color tone you were thinking of, however; that only makes it a little easier to pair it with other landscaping accents because of its non-overbearing appearance. A light shade, naturally colored black river rock ready to bring out the potential wonders out of front yard, side yard, and backyard. All Geobunga rocks and pebbles are hand-selected, responsibly sourced, and eco-friendly. Sizes Available 1/2" x 1" 1" x 2" 2" x 3" 3" x 5" 6" x 8" All sizes come in a 50lb bag.