'Calin' is a stylish sterling silver contemporary design opal necklace pendant bezel set with a bright green and blue-coloured, freeform-shaped Australian doublet opal with red flashes. This pendant comes with a complimentary silver plated chain. Opal size: 14mm x 7mmOpal shape: FreeformOpal type: Doublet opalOpal colour: Blue and green with red flashMetal: Sterling silverSKU: SDP001 ABOUT DOUBLET OPALS Australian doublet opals consist of two layers - a slice of exceptional quality, colourful natural opal set onto a dark backing made of resin, ironstone or potch, which darkens the appearance of the gemstone. Doublet opals are suitable for all types of opal jewellery, including gold and silver settings, and are affordable alternatives to solid black opals. Read more about Australian opals.