Australian Boulder Opal Ring A Sphalerite This tiny amber sphere holds

This tiny amber sphere holds an insect inside

Weight: 8 oz

which can be distributed randomly

Large mookaite cabochon in shades of red set into an adjustable sterling silver ring with a vintage floral design

Appx size: 27 x 26 mm

Australian Boulder Opal Ring A Sphalerite This tiny amber sphere holdsAustralian 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