SILBERMANN ring with white star sapphire approx. 16 ct surrounded by sapphires

SILBERMANN ring with white oval star sapphire ca. 16 ct, good quality with very beautiful distinct star surrounded by small round faceted sapphires in a dark blue, abraded, 18K white gold, 10.9 g, ring size 56, 2nd half of 20th century, signs of wear, marked Andreas Silbermann, Stuttgart, solid craftsmanship.