I think its got a partial mark on the catch but it tests as 14k... From 1910's to 20's... A truly stunning antique brooch! The item "Antique Art Nouveau 14k Gold PinBrooch Heart Shaped with Amethyst & Pearls" is in sale since Tuesday, December 10, 2019. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Art Nouveau/Art Deco 1895-1935\Pins, Brooches".
The seller is "attic*angels" and is located in Homer, Michigan. This item can be shipped worldwide.