This is an antique brooch I purchased nearly 20 years ago. It's made of glass, not a gemstone. It has an amethyst-like color. I believe the metal is brass. I'm not sure how old it is. Approximately 5.5cm in length and width. I have pets. I will be careful when packaging, but there is a possibility of pet hair getting mixed in. If you are concerned, please refrain from purchasing.