Centering on a square fancy yellow diamond framed by round diamonds

METAL: 18k white and yellow gold
DIAMONDS: 1 cut-cornered rectangular modified brilliant-cut fancy yellow diamond measuring 10.19 x 9.03 x 6.11 mm and weighing 5.18 carats
- 58 round diamonds stated to weigh a total of 3.41 carats
CERTIFICATE: With report 14131292 dated 22 December 2004 from the Gemological Institute of America stating that the 5.18 carat diamond is Fancy Yellow, natural color, SI1 clarity
SIGNATURE: GRAFF
MARKS: N1, 750, Italian assay mark, 1926
SIZE/DIMENSIONS: US ring size 7
GROSS WEIGHT: 12.0 grams

Yellow diamonds are found in mines throughout the world. The color is caused by the substitution of nitrogen atoms for carbon atoms in the diamond crystal lattice and the intensity of the color is dependent upon the amount of nitrogen. This exchange causes the diamond to absorb blue light and selectively transmit yellow light. With a strong enough yellow hue, the diamond will exceed the D to Z color range and will be graded as ‘Fancy Yellow’. With increasing saturation, the diamonds will be graded as either Fancy Light, Fancy, Fancy Intense or the most saturated, Fancy Vivid.