Noble Metal French Handmade Gold Longchain. Platinum and Diamond Rocket Ship Brooch, c. Mid-Century. Victorian Locket and Book Chain Necklace. Noble metals are naturally occurring pure metals that resist oxidation and corrosion including gold, silver and the platinum group. French Handmade Gold Longchain. Platinum and Diamond Rocket Ship Brooch, c. Mid-Century. Victorian Locket and Book Chain Necklace.