The listing, Vintage Blue Crystal Screw Back Dangle Earrings has ended.
These were purchased at an Estate Vintage Shop in my hometown area and are a bit over 1 1/4 inch long. The stone in the setting at the widest point is just a bit under 3/4 inch wide and is a deep blue shade crystal. These are screw backs, and are not pierced earrings. They can be worn if you have pierced ears, but I wanted to clarify. The stone is a nice large size and if I had to guess, I would say it would be about 3 carats in each earrings, in size, if it were sized like that. They are probably from the 1920's-1940's..the flapper era.