Vintage Artisan Kidney Shaped Brooch/Pin with Green Malachite Gemstone

Estate Find! Vintage Artisan Kidney Shaped Brooch/Pin of silver with beautifully marked Malachite gemstone. Green is the internationally recognized color representing transplant. Brooch appears to be sterling silver and polished up well, but there are no markings as to artist or metal content. 2-1/4’ long.