Here's a bangle bracelet made entirely of glass or agate.  I don't know which one it is.  I don't see any bubbles within when I look through a magnifier.  The bangle is swirled or layered with varying colors of carnelian reddish-oranges and off whites.

The inside diameter is approximately 2 1/4".  The bangle is about 3/8" wide and 1/4" thick.  I dont see any cracks, but I do see several tiny surface imperfections that I cant tell what they are.  Please make sure to look at every photo.  Thanks!