Lot 379. An impressive diamond three-row necklace. Estimate CHF 1,300,000 - CHF 2,200,000 (USD 1,315,046 - USD 2,225,463). © Christie's Images Ltd 2017.

Designed as three lines of graduated circular-cut diamonds, the nine larger diamonds weighing approximately from 4.45 to 2.21 carats, detachable to wear as three separate necklaces, 39.0 cm, mounted in platinum.

Accompanied by report no. 5181665020 dated 25 August 2017 from the GIA Gemological Institute of America stating that the 4.45 carat diamond is F colour, VVS2 clarity. 

Report no. 5181665036 dated 28 August 2017 from the GIA Gemological Institute of America stating that the 3.26 carat diamond is D colour, VS1 clarity; also with a working diagram indicating that the clarity of the diamond is potentially Internally Flawless.

Report no. 6183665304 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 3.08 carat diamond is H colour, VS2 clarity. 

Report no. 2181665019 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 2.53 carat diamond is F colour, VS2 clarity.

Report no. 5182665039 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 2.53 carat diamond is G colour, SI1 clarity.

Report no. 2181665037 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 2.52 carat diamond is D colour, VS1 clarity.

Report no. 1182665306 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 2.32 carat diamond is D colour, VS2 clarity.

Report no. 2181665018 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 2.26 carat diamond is D colour, SI1 clarity.

Report no. 6183665033 dated 10 August 2017 from the GIA Gemological Institute of America stating that the 2.21 carat diamond is D colour, VS1 clarity.

The owner, wearing lot 379, at a reception held by King Umberto II of Italy, 1956. Private collection. All rights reserved.

Lot 377. A diamond fringe necklace. Estimate CHF 250,000 - CHF 400,000 (USD 252,894 - USD 404,630). © Christie's Images Ltd 2017

Of baguette and circular-cut diamond articulated swag design, interspersed with circular-cut diamonds, suspending graduated pear-shaped diamonds, together with tiara mounting, 1950s, 38.0 cm

Illustrated as a tiara.

The owner, wearing lots 375 and 377, at a social event, 1959. Private collection. All Rights Reserved.

Lot 378. A diamond bracelet, by Harry Winston. Estimate CHF 200,000 - CHF 300,000 (USD 202,315 - USD 303,472). © Christie's Images Ltd 2017

Composed of two rows of graduated pear-shaped and marquise-cut diamonds, 17.0 cm. Signed Winston for Harry Winston.

Lot 375. A diamond brooch. Estimate CHF 30,000 - CHF 50,000 (USD 30,347 - USD 50,579). © Christie's Images Ltd 2017

Of stylised foliate design, the baguette-cut diamond stem to the marquise-cut diamond leaf, 6.5 cm.

Lot 376. A gold and diamond evening bag, by Faraone. Estimate CHF 25,000 - CHF 50,000 (USD 25,289 - USD 50,579). © Christie's Images Ltd 2017.

Of rectangular bombé design, enhanced to the front with diamond-set flowerhead details, the reverse with the similar details in polished gold, opening to reveal a mirror, three compartments and a lipstick holder, 9.0x14.0x3.0 cm, 663 gr, in wooden Faraone case. Signed Faraone Milano, no. 617.

Christie's. Magnificent Jewels, 14 November 2017, Geneva