These are great rock contrasts with robust deep brown tones, mixed with blacks, white quartz and then exploding with the green accents into the lighter portion of the rocks. With the white quartz throughout the stone, each layer is set off by another vein of green, rust, tan or black. What makes this one special is the inclusion of the copper that has been located in the brown layer, thus setting off the shiny metal against the darker brown. Another fun one to keep looking at for many different patterns and shapes!