Vintage uranium order glass ring size 7

Product Name: Vintage uranium order glass ring size 7
Vintage 925 uranium glass ring size 7. Marked nrl sterling 7. There are several makers like jd straum and vargas and uncas and more probably but couldn't find the nrl mark aside of questions about it. Beautiful ring I did not clean but it probabky was cleaned semi recently some marks still but that's to be expected with vintage rings you can get it cleaned if you like. The glass has some minor flea bites also to be expected but nothing you can see order easily.