Sparkling brooch by LISNER features jet black chatons in a japanned setting. It is signed on the reverse (on the stem) but it is impossible to read in the photo and not so easy to decipher under magnification. It measures 2 1/2 inches long by 2 inches at its widest. The condition is fine with no issues. I believe this is a maple leaf.
According to old native American legends, maple trees hold the balance of wisdom, balance, and practical magic. Also, the maple leaf as a Canadian symbol dates back to the early 18th century, and is depicted on current and previous flags, the penny, and on the coat of arms (or royal arms).