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A MAGNIFICENT D COLOUR, INTERNALLY FLAWLESS DIAMOND BROOCH
'For many centuries, the diamond has been a symbol of everlasting love, prosperity and power. It is the hardest, most resistant mineral produced by nature and bares the potential for crystalline perfection. These characteristics, combined with striking beauty, have merited the diamonds high esteem and status. In nature, the excavation of many tons of earth is necessary in order to recover a gem-quality diamond of between 1 and 2 carats. Accordingly, the discovery of a large top quality diamond, permitting the creation of a faceted gem over 50 carats, is one of nature's extraordinary phenomena - a true gift to mankind.
The 53.07 carat diamond described in the mentioned Diamond Report is one of these exceptional rarities. It possesses a purity of colour and high degree of transparency, which are particular to the world's finest natural type IIa diamond. Diamonds of this type and size, displaying such a superior quality, are particularly rare and have been unearthed from only a limited number of sources around the world, such as South Africa, Brazil and India.
In addition, this remarkable diamond possesses a well proportioned octagonal form, which is complemented by the expertise conducted to finish the polish and symmetry of the faceted gem. Deserving particular mention, this extraordinary diamond displays a very high degree of scintillation, which is uncommon for diamonds polished in the step cut fashion.
Such a combination of outstanding attributes in a diamond exceeding 50 carats establishes this gems position in a very elite class'.
Georges Bosshart and Christian Dunaigre of the Gübelin Gemlab
A MAGNIFICENT D COLOUR, INTERNALLY FLAWLESS DIAMOND BROOCH
Details
A MAGNIFICENT D COLOUR, INTERNALLY FLAWLESS DIAMOND BROOCH
The Asscher-cut diamond weighing 53.07 carats within a triple-tier diamond surround, mounted in platinum
With certificate no. 12318149 dated 25 November 2002 from the Gemological Institute of America stating that the diamond is D colour, internally flawless clarity
With certificate no. 0301124 dated 3 February 2003 from the Gübelin Gemlab stating that the diamond is D colour, internally flawless clarity
Accompanied by a note stating 'Diamonds are classified into two fundamental groups based on the relative presence or absence of nitrogen incorporated into the crystal structure, as determined by the infrared spectum. Type I diamonds contain appreciable concentrations of nitrogen, whereas type II diamonds are chemically very pure and do not reveal infrared absorption characteristics related to nitrogen.
A further separation of these two groups includes type Ia (nitrogen atoms present in pairs of groups), type Ib (isolated nitrogen atoms), type IIa (no measurable traces of nitrogen) and type IIb (traces of boron).
Based on its infrared spectrum, the 53.07 ct diamond described in Diamond Report no. 0301124 is classified as a type IIa.
The Asscher-cut diamond weighing 53.07 carats within a triple-tier diamond surround, mounted in platinum
With certificate no. 12318149 dated 25 November 2002 from the Gemological Institute of America stating that the diamond is D colour, internally flawless clarity
With certificate no. 0301124 dated 3 February 2003 from the Gübelin Gemlab stating that the diamond is D colour, internally flawless clarity
Accompanied by a note stating 'Diamonds are classified into two fundamental groups based on the relative presence or absence of nitrogen incorporated into the crystal structure, as determined by the infrared spectum. Type I diamonds contain appreciable concentrations of nitrogen, whereas type II diamonds are chemically very pure and do not reveal infrared absorption characteristics related to nitrogen.
A further separation of these two groups includes type Ia (nitrogen atoms present in pairs of groups), type Ib (isolated nitrogen atoms), type IIa (no measurable traces of nitrogen) and type IIb (traces of boron).
Based on its infrared spectrum, the 53.07 ct diamond described in Diamond Report no. 0301124 is classified as a type IIa.