Hand cut circles of mineral colored Tiffany glass in a mixture of 5 sizes from 1.5 cm to 5 cm diameter in coordinated colors and finishes. Mounted on sheets for preservation and for easy removal, simply pull off as needed. Perfect for adding circular and semi-circular elements to your mosaic design, such as bubbles, leaves, petals and natures forms. Specially designed for all the mosaic artists that love the beauty of stained glass but not the work to cut those giant sheets down to tesserae. The glass is a Tiffany style glass made from recycled window (float) glass and various mineral oxides. The circles are UVA and frost resistant and the iridised finish on selected pieces permanent.