Queensland Boulder Opal - Red, Blue, Green Gold Tone Earring 0mm width at the top

0mm width at the top near the stud

with the doublet backer is piece of grey opal "potch" or single colour opal

5mm long x 9mm wide Fine Silver

This one has 10 with pink sapphires that fade from light to dark to light again

Queensland Boulder Opal - Red, Blue, Green Gold Tone Earring 0mm width at the topFrom Tall Trees Studio Solid piece of red, blue, green and gold tones Queensland Boulder Opal on Ironstone. Boulder opal forms within ironstone boulders, the silica, a key component of opal, is released into the groundwater through the weathering of surrounding rocks, particularly sandstones and mudstones. Groundwater moves through the rock, it carries the dissolved silica and its this silica rich water then seeps into cracks and voids within the