Stunning hand carved Boulder opal butterfly and rose set in artisan crafted solid sterling silver ring!!! Size 8 30150 Boulder Opal calms the inner soul by representing the interplay of emotional elements, as seen by its refracting colors. This gemstone, which yields one-of-a kind-pieces that are unlike any other, facilitates personal actualization and self-awareness. It is an excellent stone for progress, expansion, and development.