G. (London, 1962). Necklace. Titanium, Japanese silk cord, white diamonds, 21 x 13 x 1.5 cm (8.3 x 5.1 x 0.6 in.). Signed 'G' London. © TEFAF

This necklace featuring four rare Old Mine diamonds all displaying the typical 'water' characteristic, weighing 27.24ct (type II A), 15.45ct, 12.85ct and 8.70ct respectively. This necklace, gifted to Helen Hay Whitney in New York in 1902, has since been redesigned by G into this piece which celebrates its history but brings to life its new contemporary setting.

G. (London, 1962). Ring. Marquise diamond, mounted in 18ct red gold and bronze, trimmed with white diamonds, 2.5 x 2.5 x 2 cm (0.9 x 0.9 x 0.8 in.). Signed 'G' London. © TEFAF

An Old Mine White Diamond ring featuring a GIA certificated 10.01ct Marquise cut Diamond of D colour and of an internally flawless purity. This diamond has an additional GIA appendage stating that it is of category Type II A meaning it is chemically the purest variety of diamond.

G. Stand 139 at TEFAF Maastricht, March 10-18, 2018