An Exceptionally Rare Diamond Ring

The old mine cushion-shaped diamond weighing 33.03 carats, mounted in platinum, size 6.

Accompanied by a GIA report no. 1132099959 stating that the diamond is D color, Internally Flawless. Together with a letter from the GIA stating that the diamond has been determined to be type IIa. Accompanied by Gübelin report no. 11070062 stating that the diamond is D color, Internally Flawless. Together with a note stating that the diamond is classified as type IIa, and an appendix stating "the diamond of 33.03 carats possesses an antique cutting style which is rarely encountered in the gem trade today. In addition, this diamond is classified as type IIa (a chemically very pure type of natural diamond). It displays a colour and degree of transparency which are particular to the finest of these unique gemstones. Diamonds of this type, exhibiting an antique cutting style as well as a superior quality, are very rare and will most certainly evoke references to the historic term of 'Golconda'." Due to the shallow cut, the diamond faces up more like a 45.00 to 50.00 carat stone. Sits low to the finger. A truly enchanting diamond with superb optical transparency. Mounting in excellent condition.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. 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. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.

Accompanied by a GIA report no. 1132099959 stating that the diamond is D color, Internally Flawless.  Together with a letter from the GIA stating that the diamond has been determined to be type IIa.

Accompanied by Gübelin report no. 11070062 stating that the diamond is D color, Internally Flawless.  Together with a note stating that the diamond is classified as type IIa, and an appendix stating "the diamond of 33.03 carats possesses an antique cutting style which is rarely encountered in the gem trade today.  In addition, this diamond is classified as type IIa (a chemically very pure type of natural diamond).  It displays a colour and degree of transparency which are particular to the finest of these unique gemstones.  Diamonds of this type, exhibiting an antique cutting style as well as a superior quality, are very rare and will most certainly evoke references to the historic term of 'Golconda'."