Rare Boulder Opal freeform faceted beads (ETB00457) Size:A It is said to be

It is said to be opaque and unattractive when found in the field

similar to a geode

Spinel forms in the same rock units

Indian Paint Jasper

Rare Boulder Opal freeform faceted beads (ETB00457) Size:A It is said to beAustralian 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