Beautiful gold/brass necklace

The detailing on this necklace is stunning. I’m not positive, but I think it’s J. Crew. There is an extender chain on the back of the necklace so that you can wear it shorter or longer. It is shown at its shortest length in the first picture and its longest length in the last picture. Please note that this listing if for the necklace only and the top is just shown in a couple pictures to demonstrate how the necklace would look over a blouse. Jewelry Bin