This beautiful Koroit boulder opal gemstone ring features  beautiful veins of fiery blue, green, and red opal. The gemstone is set in a smooth bezel housing surrounded by hand saw cut design edges. Most Boulder Opal is mined in Australia where thin veins of opal form within the brown ironstone matrix. The ring is made by a Navajo native american artist. It measures 1.15" long and 0.61" wide. Ring size is 7 1/4.