Each opal rhondel is approximately 5 mm each with diamond cut sides. Each set of opals hangs from a 14k yellow gold filled chain with 2mm enamel colored beads; the effect is simply divine. This is a great necklace to wear on its own or to layer with other favorite pieces. The gem row measures 1 inch long. Choose your necklace length and bead color from the drop-down menu. These opals are a natural ethiopian gem Ethiopian opals are often “hydrophane” meaning they can absorb water, this will enhance or dull their play-of-color. This characteristic sets them apart from Australian opals, which are generally non-hydrophane. Storing this piece in a small zip loc bag when not being worn would be advised to keep the moisture content.