Gorgeous yellow trilliant cut citrine

This trilliant cut loose stone was from my mother's collection, she used to make jewelry. This one comes from a bin that doesn't have any information so I've tried to figure out which stone is which due to my best ability, but unfortunately I can't prove that these stones are what I think they are, so they will be priced lower than the stones that I have documentation for. This stone is gorgeous and deep deep yellow citrine, it would be large enough for a ring or necklace or any other custom jewelry.