I'm reminded of mother of pearl and carnival glass.
Really great use of color here!
This really is superb. Easily the best depiction of glass I've seen in pixel art, and that palette is beautiful!
The shading on that glass is impeccable. I love how you can see little reflections of the light source. It all just adds so much to the realism. Amazing!
That's some great shading and I love the colors you used!