JAR diamond ring.

The Graff Fascination, a three-in-one transformable tour de force boasting 152.96 carats of some of the world's finest diamonds that can be worn as an opulent high jewellery watch, a bracelet or a diamond ring.

The centrepiece of Graff's The Fascination, a unique transformable jewel, is an incredibly rare 38.13ct pear-cut diamond set into a ring.

de GRISOGONO necklace from the 2015 high jewellery collection launched at Baselworld 2015, set with briolette-cut emeralds totalling 89.63ct, round-cut rubies, marquise-cut diamonds, emeralds and diamonds.

Garrard necklace from the new Bow collection launched at Baselworld 2015. At the heart of the collection sits this spectacular high jewellery ruby bead and diamond necklace.

Chopard ruby and diamond earrings from the Haute Joaillerie collection.

Fabergé necklace from the Summer in Provence high jewellery collection, set with emeralds, turquoise beads and diamonds, holding a detachable Fabergé egg embellished with floral motifs.

Fabergé ring from the Summer in Provence high jewellery collection, set with emeralds and diamonds and decorated with enamel.

Fabergé earrings from the Summer in Provence high jewellery collection, set with emeralds and diamonds and finished with hand-painted enamel.

The new Naturale high jewellery necklace from Japanese pearl master Mikimoto incorporates a Melo pearl, a Giant Clam pearl and a Conch pearl, three extremely rare, non-nacreous natural pearls.