Large! 21.45ct all natural Queensland Boulder Opal

You are going to want to start showing this off as soon as it arrives at your house. This large boulder opal presents a stunning visual display with a well marbled matrix framing its abundant crystal core with colors that move from snow white to blue! The glossy luster of this piece shimmers across its body, and it measures an impressive 20.5mm x 15.5mm x 7.7mm. This is an untreated example sourced from the Winton area of Queensland, Australia.