3471386 \'Blue Venus\' sculpture, c.mid 19th century (sapphire, spinel & diamonds) by Unknown Artist, (19th century); height: 10.8 cm; Private Collection; (add.info.: Designed as a sculpted light blue sapphire depicting Venus, enhanced by a rose-cut diamond openwork foliate base, encasing a carved oval red spinel seal, depicting the profile of a Strozzi Medusa head); Photo 穢 Christie\'s Images; out of copyright.