This is a small 3/4 10K gold heart with tiny diamonds. The chain is very fine and I think it is gold too but can't find a mark. It also has a plated extender that I am leaving even though the chain is 18 inches long. Maybe someone can use it. This would be a great gift for a sweet 16. It will come in a velvet bag and gift box ready to give to that special person. For you from the High Plains of Kansas!