Authentic Murano Glass Disc approximately 20mm with a 1mm hole through the center. This style is known as Incalmo or White Hearts where we use an interior of white opaque glass with an exterior coating of our transparent Moretti glass. These can also be frosted for another great effect. They work with with our other opaque color beads. The color in this one is Verde Erbe (Peridot Green) Murano Glass.