These are sea glass pieces that washed ashore on the Seto Inland Sea coast. 10 pieces in total. These are half-size and full-size bottle bottoms. Rare glass with almost zero transparency ☆ (For reference: bottom row, left and center) Subjectively, I think the glass in the bottom left corner might be a deep grape color. How about using them for handmade crafts, etc.? The second to last and third to last photos show the reverse side. **The coin is for size comparison. **Sun-dried. Some have been bleached / some have been washed with running water. #seaglass #handmade #materials #accessories #beachglass #DIY #objet #aquarium #gardening #seapottery #crafts #houseplants #succulents #seacombing #bottlebottom