Here for your consideration is a lovely old Blue Opalescent Bowl from Jefferson Glass. The pattern is called Many Loops. I've seen this attributed to both Jefferson and Northwood and the molds could have moved from one company to another as doors closed.
This bowl measures 8 1/4" in diameter and is approximately 2 1/2" tall. The opalescence is found only along the outer edges of the rim, just adding a flash of white here and there.
It is in very good condition, there are no chips, cracks or nicks. There is no scratching. There is one spot along the mold line at the foot where the glass didn't seem to fill the entire mold, I thought at first it was a chip. But the edges are not sharp and it appears to be polished so I believe it is a minor imperfection in the glass.