For your consideration is an exceedingly rare and historically important c. 1890s rare antique Faberge 56 gold and enamel guilloche pin / brooch with a single white natural diamond set at center. Constructed from solid 14K Russian 56 gold and cobalt blue enamel guilloche in Starburst pattern. There is a chip to the enamel, as pictured. Fully hallmarked for Imperial Russian 56 gold. Workmaster / silversmith makers mark also evident. The masterfully crafted brooch pin measures approximately 1.5" Lenght x 0.5" Width. Weight is 3.95 grams.