Leon Nussbaum, our London silversmith carefully inlays a matrix of iridescent white opal into his sterling silver design to create this ''Tempting Tabbies'' brooch. Opal, considered ''the queen of gems,'' will flash before your eyes as quickly as your favorite feline, dancing before you as if they could spring to life at any second. Each brooch measures 1.25 inches wide. Handcrafted exclusively for Uno Alla Volta, from the heart and hands of the artisan.