VAN CLEEF & ARPELS Coral, chrysoprase and diamond necklace/bracelet combination, 'Zip', CHF260,000–480,000

VAN CLEEF & ARPELS Sapphire, coloured sapphire, garnet and diamond necklace, 'Les Jardins', CHF95,000–190,000

CARTIER Gold, enamel, diamond and sapphire vanity case, CHF6,500-11,000

BULGARI Coloured sapphire, rock crystal and diamond demi-parure, CHF95,000–140,000

Emerald ring weighing 14.69 carats, Colombia, no indications of clarity enhancement, CHF230,000–280,000

CHAUMET Ruby and diamond ring, CHF95,000–140,000