Sterling and Opal Ring Vintage Hall Marked and Stamped Sterling

The fire is coming back up in this pretty opal solitare ring in vintage sterling setting. I though the hall mark was Judith Jack but was unable to confirm. The opal cab is about 3/8 inch tall. There are cracks in the cab but a little personal body oil is bringing the color back up. My grama always said to wash dishes with your opal rings on or rub them at the side of your nose to keep the color firing in the opal. This ring is just over size 7.