Magnificent Diamond necklace and a brooch, Adler. photo courtesy Sotheby's

The necklace designed as a graduated line of thirty-nine brilliant-cut diamonds, length approximately 360mm, the brooch set with similar stones, both mounted in platinum, signed Adler. Est. 2,000,000—3,000,000 CHF. Lot Sold 2,322,500 CHF

NOTE: The necklace is accompanied by thirty-nine GIA reports, dated 2008.

Report no. Colour Clarity Weight

GIA 17492006 G VS1 3.02

GIA 8491444 H VVS1, Potential? 7.17

GIA 8462900 H VVS2 7.21

GIA 8470289 H VVS2 3.33

GIA 8457481 H VS1 3.69

GIA 7138663 H VS2 15.78

GIA 17492003 H VS2 3.01

GIA 8461380 I VVS2 2.40

GIA 8494745 I VVS2, Potential 2.16

GIA 8479692 I VS1 3.48

GIA 8489971 I VS1 3.26

GIA 17492005 I VS1 3.04

GIA 17492004 I VS1 3.00

GIA 17492867 I VS1 3.00

GIA 8455859 I VS1 2.58

GIA 8483724 I VS1 2.29

GIA 8491137 I VS1 2.17

GIA 8439734 I VS1 2.06

GIA 17492438 I VS1 2.00

GIA 8453015 I VS2 5.84

GIA 8453008 I VS2 5.04

GIA 8459310 I VS2 5.01

GIA 8398518 I VS2 4.31

GIA 8444111 I VS2 4.05

GIA 8481541 I VS2 3.04

GIA 8379119 I VS2 3.04

GIA 17492756 I VS2 3.02

GIA 8483725 I VS2 2.51

GIA 8456425 J VVS1, Potential 2.05

GIA 8485974 J VVS2 2.32

GIA 17492728 J VS1 3.02

GIA 8470478 J VS1 2.67

GIA 8474201 J VS2 5.55

GIA 8459309 J VS2 4.37

GIA 8470327 J VS2 4.03

GIA 8487820 J VS2 3.08

GIA 17492727 J VS2 3.02

GIA 17492726 J VS2 2.02

GIA 17492729 L VS1 2.00

Important Diamond ring, Adler. photo courtesy Sotheby's

Centring on a brilliant-cut diamond weighing 10.50 carats, between pear-shaped diamond shoulders weighing 1.03 carats each, mounted in platinum, size 49, signed Adler. Est. 550,000—750,000 CHF. Lot Sold 734,500 CHF Accompanied by GIA report no. 8668930 stating that the diamond weighing 10.50 carats is F Colour, VVS2 Clarity and by GIA reports no. 17492523 and no. 17492725 stating that the diamonds weighing 1.03 carats are E Colour, VS2 Clarity.

Important Diamond bracelet, Adler. photo courtesy Sotheby's

Composed of nineteen brilliant-cut diamonds, the five central stones weighing respectively 3.01, 3.01, 5.07, 5.23 and 9.02 carats, mounted in platinum, length approximately 158mm, signed Adler. Est. 400,000—600,000 CHF. Lot Sold 578,500 CHF

NOTE: Accompanied by GIA report no. 17492481 and no. 17492246, both stating that the diamonds weighing 3.01 carats are I Colour, VS1 Clarity; GIA report no. 8622821 stating that the diamond weighing 5.07 carats is I Colour, VS2 Clarity; GIA report no. 8622621 stating that the diamond weighing 5.23 carats is J Colour, VS2 Clarity and by GIA report no. 8624298 stating that the diamond weighing 9.02 carats is J Colour, VS1 Clarity.

Diamond ring, Adler. photo courtesy Sotheby's

The bezel-set brilliant-cut diamond weighing 7.65 carats, to the plain hoop, size 49½. Est. 300,000—400,000 CHF. Lot Sold 482,500 CHF 

Accompanied by GIA report no. 17796054 stating that the diamond is E Colour, VVS2 Clarity.

Diamond bracelet, Adler.

The flexible band set with radiant-cut diamonds, suspending eight similarly cut stones, length approximately 157mm, unsigned, maker's marks. Est.70,000—100,000                         CHF.Lot Sold 62,500 CHF

Accompanied by three GIA reports: no. 2105184551 stating that the diamond weighing 1.01 carats, is F Colour, VS1 Clarity; no. 5101184550 stating that the diamond weighing 1.01 carat is D Colour, VS2 Clarity; and report no. 17491880 stating that the diamond weighing 1.03 carats is F Colour, VVS2 Clarity.

Pair of diamond pendent earrings, Adler. photo courtesy Sotheby's

Each designed as a slightly graduated line of circular-cut diamonds, mounted in platinum, signed Adler. Est. 20,000—30,000 CHF. Lot Sold 21,250 CHF

Sotheby's. Magnificent Jewels, 16 Nov 10, Geneva www.sothebys.com