Boulder opal is a type of natural, solid opal found embedded in ironstone or sandstone host rock, primarily in Queensland, Australia. This stunning Australian made gemstone is prized for its unique, vibrant play of colors against an earthy background, which also gives it enhanced durability. This handmade cabochon was hand cut and polished by me. It is designed to be double sided. The captivating colour play features mostly green and blue hues, making it a one of a kind gemstone that truly stands out.