This piece is made by combining glass blown glass and dichroic glass, then firing them together in an electric kiln. Large. 73g The surface is plump and glossy... the back is flat. There are no marks from the release paper on the back, and it's beautifully fired. The last photo shows the back. There are no holes. The color of the glass is captured in bright natural light near a window, but the color may appear different depending on the conditions of the photo. Also, depending on the type and quality of the glass... the color may change or appear darker under fluorescent lights or other environments. Color differences may also occur depending on the electronic device you are using. Please understand this before purchasing m(_ _)m Glass nugget Glass beads Glass accessory parts Glass nugget Nugget Stained glass Mosaic Accessory materials Sea glass art Handmade Dichroic earrings Dichroic earrings Dichroic ring Dichroic hair tie Glass materials Glass materials Glass crafts