Twin Koi Fish Ring with Black Onyx — .925 Sterling Silver BandThirty two grams of solid . 925 sterling silver with a genuine black onyx dome sitting dead center. The onyx is smooth, polished to a mirror like depth that absorbs light instead of reflecting it a dark anchor between two koi fish carved in full relief on either side. The face measures 25mm x 28mm, making this one of the largest koi rings in the collection. Both fish curve around the stone nose to tail, with individually carved scales, fin membranes,