Australian Boulder Opal Ring A Sphalerite Appx size: 27 x 26

Appx size: 27 x 26 mm

This tiny amber sphere holds an insect inside

Weight: 8 oz

All of the citrine that I list is either heat treated or irradiated quartz

which can be distributed randomly

Australian Boulder Opal Ring A Sphalerite Appx size: 27 x 26Australian Boulder opals are the second most valuable type of opal (following naturally 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