I think this is a VENDORM brooch. There's a marking on the back, but I'm not certain. (I think the retail price was around 20,000 yen, but I'm not sure about that either.) The brooch looks luxurious, and the green stone in the center is very stylish and chic. Please consider this item with the understanding that it is used. The back, in particular, shows signs of aging, so please be aware of this if it concerns you.