All natural 20.57ct Queensland Boulder Opal!

This boulder opal is big, bold, and beautiful. The rich earthy matrix of this piece is filled with colorful opal veins, and covered with a gorgeous liquid luster. Measuring a whopping 20.3 x 17 x 6.5mm, this all natural opal has incredible size and is ready to set and impress. Sourced from Queensland, Australia. Untreated!