ADAM'S Fine Jewellery & Ladies Watches 12th May 2026

TUESDAY 12 TH MAY 2026 . STARTING AT 4PM 80 70 AN IMPORTANT DIAMOND SINGLE-STONE RING The pear-shaped diamond weighing 12.48cts within a ten-claw setting, to a plain hoop, mount- ed in 18K gold, ring size N½ € 30,000 - 40,000 Accompanied by a report from the HRD laboratory in Antwerp, stating that the natural diamond weighing 12.48cts, is of Fancy IntenseYellowish Brown colour, VS1 clarity . Report no. 260000060316, datedMarch 17 2026. Coloured diamonds have been prized since at least the 17th century, when Jean-Baptiste Tavernier, the celebrated French merchant and traveller, began recording notable examples in his accounts. In 1669 he sold the famed Tavernier Blue, later known as the French Blue, to Louis XIV, and he also described pink diamonds, among them the remarkable Grand Table, a rough stone of over 200 carats shown to him in Golconda in 1642. Around 1668, he is also known to have purchased two pale pink diamonds, which he illustrated in his travel book. Such stones are rarer than their near-colourless counterparts, their colour arising from unusual conditions during formation deep within the earth. In most coloured diamonds, trace elements within the crystal structure are responsible for the hue: nitrogen produces yellow, while boron gives blue. Pink diamonds differ in this respect, their colour being attributed instead to a distor- tion of the crystal structure. As with all coloured diamonds, rarity and intensity of colour remain central to their appeal, and the most vivid stones are the most sought after.