Queensland Boulder Opal - Blue Tone Earring Stud diameter 20mm x 14mm

Stud diameter 20mm x 14mm

Ring Size: Q 3/4 (18

Pendant Length - mm

7mm long x 6

This Diamond just flashes as it moves

Queensland Boulder Opal - Blue Tone Earring Stud diameter 20mm x 14mmFrom Tall Trees Studio Solid piece of cool blue tones Queensland Boulder Opal on Ironstone. Boulder opal forms within ironstone boulders, which are concretions of iron rich sediments. The silica, a key component of opal, is released into the groundwater through the weathering of surrounding rocks, particularly sandstones and mudstones. As groundwater moves through the rock, it carries the dissolved silica. The silica rich water then seeps into cracks