I think you're looking for the words opaline or opalescent rather than vaseline to describe the opaque bits towards the top.
Vaseline is an american term, and it always refers to uranium. I have never worked out if an opalescent component is compulsory in "vaseline" or not.
I just avoid using the term completely. It's a confusing one, best dropped.
If you hold the rim up to the light and can see there is a "fire" glowing inside the glass, it is opalescent.
If it's just plain white, it's opaline.