These are SO neat!
Vintage Glass Cabochons, created in the 1960's, they are a textured cab that I'm sure they didn't intend to look like a brain, but that's exactly what I saw in these when I made my Zombie Fascinator Hair Clip that I've shown in the last photo to give you an idea of what has been done with it!
(for part 1 and 2 instructional videos to make this Hair Clip, visit: https://youtu.be/fOgQPYwcIQI ).
This cab measures 25x18mm.
The color is a warm, light pink.
It has a textured top, and a relatively flat back.
There may be the occasional ding in the back edge, as these are over 50 years old, but that shouldn't keep you from using it to the best advantage.
You will receive one cabochon.