15x7x4.5mm average Owyhee Natural Denim Blue Opal Faceted Cubes have a waxy luster, exhibit excellent faceting and polish on the side drilled emerald cut with pavilion. These emerald cut Blue Opal beads are symmetrical in shape with a consistent tone throughout the strand. The natural color is a medium light slightly greyish denim blue for a very soothing group of Blue Opal beads mined in Oregon, USA.