This ring is really beautiful. It is a black druse geode crystal stone that really sparkles in the light. The stone measures about 1 inch. The ring fits snug on 7-1/2 ring size It can adjust smaller or larger. I would say in the range of 7-8”. I do not see a makers mark.
For All Colorado Residence State Sales Tax is 2.9%
Gorgeous Geode Natural Stone Black Druzy Crystals Silver-tone Ring Rough Cut Adjustable Size Approximately 7-8 Ring Size