A DIAMOND RING
Designed as a serpent, the head set with a pear-shaped diamond weighing 2.49 carats to the circular-cut diamonds and pavé-set diamond coiled tail, size 5¼
With certificate 0008022 dated 9 August 2000 from the Gübelin Gemmological Laboratory stating that the diamond is D colour, VS2 clarity
Accompanied by a note stating the following:
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 spectrum. 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 groups includes type Ia (nitrogen atoms present in pairs or 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 pear-shaped, brilliant-cut diamond of 2.49 carats is classified as a type IIa diamond.