I have an enamel brooch in the shape of leaves on a stem, with something like mother-of-pearl in shades of green and turquoise on the front. On the back the brooch is marked with a name which appears to be Duri but may be Dusi. The item has been owned for at least 20 years and was purchased at a jumble sale. Can anyone identify the maker and tell me anything about this type of jewelry, please? I will happily e-mail photos of the brooch if it will help solve the mystery!