Our Opal Plugs are black in color with a raw synthetic (Lab Grown) opal shape encased in a clear dome flare to magnify the opals brilliance & color.
This is a special kind of opal that is compatible with borosillicate glass. Real opal contains water and will cause the glass to crack. Other synthetic opal that is set in metal is plastic or resin based and will melt when used in glass.
Each opal will vary in shape, size and color (fire) from piece to piece. Black reversible back. We do our best to provide pairs of matching jewelry by manufacturing 2 at a time.