This is a glass from UMIKAZE, a Ryukyu glass studio in Yomitan Village, Okinawa Prefecture. It's a rock glass inspired by the "Blue Cave" located under the cliffs of Maeda Cape in Onna Village, Okinawa Island. It seems to be discontinued now. It was displayed and is unused, but there might be some minor scratches if you look closely. Due to being handmade by artisans, there are individual differences in the bubbles and color patterns. (The last photo is a reference image) The size is approximately 7cm in diameter and 8.5cm in height. I'm selling it to declutter due to moving. Thank you. A black rock glass with beautiful blue light. - Color: Black and blue gradation - Material: Glass - Design: Blue light effect on the transparent bottom - Shape: Cylindrical Ryukyu Glass Ryukyu Glass Okinawa Yomitan Village Black Blue Green Black Blue Green Thank you for viewing.