Owyhee Denim Blue Opal Faceted Marquise Briolettes measure approximately 12x7mm to 18x10mm in size, the gems have a waxy luster, exhibit good faceting and polish with a few areas of matrix. These Denim Blue Opal gemstones show a light to dark slightly grayish denim blue hue with a mottled coloration providing for a very soothing group of Blue Opal marquise beads.