Sliced, polished agate slab shows off concentric color bands in blues, whites and purples. Our specimens make perfect exhibits for a desktop or book case. Each slab nestles snuggly into custom-fitted wooden bases. Polished Agate Slabs are available in various colors, depending upon stock availability. Agate's color bands follow the outline from the cavities in which the mineral has formed. The colors result from the differing impurities present. These polished pieces are of the finest quality. You won't be disappointed with this one!