These are natural sea glass pieces. They were collected in Chiba. Approximately 820g. They have not been sorted, so some pottery shards are also included. [Material Characteristics] This sea glass is characterized by its various colors and is perfect for handmade crafts and artwork. They are fragments of glass polished by the sea, allowing you to feel the beauty of nature. [Color Variations] The sea glass includes green, blue, white, brown, and clear pieces, enabling diverse expressions in art projects and decorations. - Material: Sea glass - Colors: Green, blue, white, brown, clear - Uses: Handmade crafts, crafting materials