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 puffed heart is 12mm. Hearts sometimes have a few little bubbles in the glass. Accents are white cultured freshwater pearl, and Austrian crystal. 1-1/2" (40mm) long from the top of the shepherd hooks. Ear wires and head pins are 14 kt. gold-filled, daisy spacers are plated. Gift-ready in either an organza bag (default) or gift box upon request. Packaging styles change with availability.