Ryukyu Glass Glass Plate Bubble Swirl Plate RGC Plate Okinawa Ryukyu Glass Dish A smooth, ripple-patterned circular glass plate with beautiful transparent gradations of blue, orange, and green. Blue Orange Green 24-25cm - Color: Blue and transparent gradation - Design: Ripple pattern - Shape: Circular - Material: Glass There are black dots on the green and orange from the beginning. The "black dots" seen in Ryukyu glass are not dirt or defects, but are considered unique characteristics of handmade or recycled glass by artisans. They are also said to be proof of genuine Ryukyu glass. We ask for your understanding.