This is a Clyde Duneier bracelet. It is marked 10k in two places. I have a diamond tester and the little diamonds through out tested real. The black/blue stones appear black at first but under light or sunlight you can see they are blue, therefore it is my belief that they are Australian Sapphires. The bracelet was sized to a 6.5” and there are enough extra stone pieces included to size it back to its original size or perfect amount for matching stud earrings which was my plan but never got around to it.