This is a color-stable dyed Brazilian agate. It is mostly opaque except for the clear section at the bottom. It has beautiful flowing bands of deep blue and the top is capped with a nice sparkling area of drusy. The blue reminds me of the ocean with the drusy on the top looking like the foam from crashing waves.

The back is polished.
The size is 42 mm tall by 3 1mm wide by 5 mm thick.