Boulder Opal freeform faceted beads (ETB01581) Rarestone

{Welcome to Sparklelittle!} Rare Boulder Opal freeform faceted beads (ETB01581) Size: 17x25 - 22x30mm - they can carry small variations. Length: 16 inches { D e s c r i p t i o n } Australian Boulder opals are the second most valuable type of opal (following black opal). Boulder opals are easily distinguished by their layer of solid brown ironstone left on the back of the stone. Boulder opals, as the name suggests, are mined from large ironstone boulders under the ground. Thin veins of colourful opal forms in cracks and fissures in these boulders. Because these veins of colour are so thin, opal cutters need to leave the ironstone on the back of the opal to form a full sized stone. The thin layer of opal in boulder opals can display any colour of the spectrum in a beautiful play of colour. You will receive the same quality as you see in my pictures, I always send from the same batch. I will randomly select one strand. As the colour & size can vary slightly, please do not request for one particular strand. You can buy the whole batch to ensure you will get the best ones.