This is dichroic glass with a gradient color from yellow to blue-green. Size (approx.): 4.2cm x 4.8cm Thickness: 3mm COE90 The base is black. Please check the photos before ordering. These are leftover scraps from production. There are no noticeable cracks or chips, but please be aware that there may be minor scratches due to being scraps. Bulk purchases are also possible. Please feel free to contact us. * Depending on the combination of sizes, it may not be possible to ship them together. We will pack them carefully, but due to the nature of the material, there is a possibility of cracks or breaks during transportation. Please consider this before purchasing. Instant purchase is OK. Can be used for fusing as well as stained glass.