Sea opal is a clear dreamy milky white with undertones of pale blue or yellow depending on your light source. I see more yellow in bright sun, and more blue the rest of the time. Sea opal is the name of the color. There's no actual gemstone called sea opal. They also go by the trade name "opalite", and are made of glass. The briolette is a 12x8mm flat faceted teardrop. Beads are meticulously wire-wrapped for beauty and security. All silver is sterling. 1-1/4" (30mm) long from the top of the lever backs. Gift-ready in either an organza bag (default) or gift box upon request. Packaging styles change with availability.