A group of gold and silver jewels

A group of gold and silver jewels, 19th and 20th centuries, comprising: a synthetic colour change sapphire ring; an amethyst ring, two gold brooches set with seed pearls, a lyre brooch set with turquoise, half seed pearls and garnets, a gold bow brooch with pendant hook; a gold, red paste and half seed pearl necklace; and a silver buckle of baroque inspiration