Antique, early Art Deco 10K white gold fine filigree pin set with a square blue topaz. All tested and guaranteed. Marked a shown on the catch, with 10K, and the maker's mark which I cannot identify. It measures a hair under 2 inches long, one and fifteen sixteenths inches, and is half an inch wide at center point. It is in excellent condition. Box is not for sale; it was used solely to steady the pin for the photos.