Thank you for viewing! I tried melting broken dishes and marbles using an electric furnace. The ones with mixed colors are made by melting broken glass bottles and such together with the broken dishes. The back side is flat. ● These are handmade items by an amateur. Please understand. → Some of the grains have become cloudy on the back due to the release paper. There are also some areas on the sides of the grains that have become white. ● Some original scratches remain on the surface of the marbles. ● There is a smoker in my family, so please consider this again if you are concerned. ● For those who can use these as materials for crafts, art, sea glass art, etc., or as interior decorations, I would be happy if they catch the eye of someone who thinks, "Oh! That looks interesting!" I will wrap them in bubble wrap and send them. ● The cost of the release paper used when melting the glass has increased, so I apologize for this price setting. If you can agree to the above, please consider purchasing. Materials for sea glass art Materials for accessories Accessory materials #seaglassart #glassnuggets - Multi-colored glass beads, perfect for stained glass and art projects. - Color: Multicolor (blue, green, orange, transparent) - Material: Glass - Shape: Irregular shape - Size: Various sizes (small to medium) - Use: Materials for stained glass and art projects