Fancy intense yellow diamond necklace

The detachable pendant set with a heart-shaped fancy intense yellow diamond weighing 10.39 carats and a similarly cut near colourless diamond weighing 1.82 carats, the necklace set throughout with brilliant-cut diamonds and diamonds of yellow tint, length approximately 355mm.

Accompanied by GIA report no. 2195251591, stating that the heart-shaped diamond, weighing 10.39 carat, measuring 13.95 x 14.86 x 8.50mm, is Fancy Intense Yellow, Natural Colour, VS2 Clarity, and report no. 5191251602, stating that the heart-shaped diamond, weighing 1.82 carat, measuring 8.76 x 9.30 x 3.86mm, is H Colour, VS2 Clarity. Also accompanied by GIA report no. 2195251691 and no. 2195251697, both stating that the circular-cut diamonds, weighing 0.21 and 0.24 carats, measuring 3.96 x 3.89 x 2.22 and 4.10 x 3.80 x 2.36mm, are Fancy Deep Orangy Yellow, Natural Colour, SI1 and I1 Clarity respectively. Please note that not all the diamonds of yellow tint have been tested for natural origin. For more information on the heart-shaped diamonds please refer to GIA reports, remaining diamonds of yellow tint estimated to weigh a total of approximately 6.50 - 7.50 carats, remaining near colourless diamonds estimated to weigh a total of approximately 9.00 - 11.00 carats, on average G-H colour, VS clarity, as gauged and graded in the mount. Scratches to the metal consistent with light use. Clasp secure, safety hook. In good condition. Gross weight approximately 37 grams.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Accompanied by GIA report no. 2195251591, stating that the 10.39 carat diamond is Fancy Intense Yellow, Natural Colour, VS2 Clarity, and report no. 5191251602, stating that the 1.82 carat diamond is H Colour, VS2 Clarity. Also accompanied by GIA report no. 2195251691 and no. 2195251697, both stating that the circular-cut diamonds are Fancy Deep Orangy Yellow, Natural Colour, SI1 and I1 Clarity respectively.