Sea glass collected from the beautiful sea in Wakayama, Japan ✨ It has been bleached, rinsed with water, and dried in the sun. This set includes thick pieces, like the bottom of a bottle. I hope you can find a use for them. A 10-yen coin is included for size comparison (see photos). Perfect for sea glass art, crafting accessories, glass fusing, or decoration! As these are natural items, some pieces may have cracks or chips, and are listed as having some scratches or stains. I hope for a wonderful encounter with someone who appreciates these natural treasures.