Four 4 x 4 inch blue on blue heron coasters. These fused glass dishes created by a series of processes. After the initial firing of the glass, hand drawn images (by the artist) are developed onto a photo sensitive sandblasting film, applied to the glass, then sandblasted, leaving the 4 different heron images engraved onto the glass. Finally, the sandblasted area is filled with color and re fired. Food safe, hand wash. Custom color combinations welcome.