They are older, from the 40s to 50s. The construction of the clip in back is double prong, which eventually went out of style because it was difficult to work with. The oval has all clear rhinestones in pot metal base. The second on has blue diamond (or squares on their sides!) shaped rhinestones surrounded by clear, all prong set. This one has a fine rhodium style finish in back so could be later 50s, but good quality.
No flaws, no missing stones. Will come in a gift box.
Holiday hair? Retro prom? Retro Bride?

This item is sold from an excellent, highly rated vintage boutique in Northfield, OH.