In most cases, there is NO NEED to remove the diamonds from their settings when appraising jewelry. However, when the setting affects the grading of the diamond, such as this 5 carat cut-cornered rectangular modified brilliant cut diamond ring with an 18k yellow gold setting which purposely makes it look like a fancy light yellow diamond, the most accurate way to grade it is to remove the diamond from its some-what confusing setting. (The rest of the setting is in 14K white gold and G-H mellee diamonds). The truth has revealed that it’s an L near-colorless diamond.
This setting has been popular in the jewelry industry for 20 years to enhance the yellow color of diamonds that are L and below. It’s a genius approach to sell those less-favored diamonds but they need to be sold as they are, the sellers need to disclose and the buyers need to know what they are paying for: a fancy light yellow diamond or an L near-colorless diamond. The prices per carat are greatly different between them.
Scientifically, the impurity element Nitrogen and the way it’s arranged in the crystal lattice of a diamond is the color cause for yellow diamond. I will publish a blog about yellow diamond soon, stay tuned!
The look of a "fancy light yellow diamond" before the diamond was removed from the 18K yellow gold setting.
The truth has revealed: it's an L near-colorless diamond. The 18K yellow gold setting has enriched its yellow color and makes it look like a fancy light yellow diamond.
Photo of the back of the 18K yellow gold setting, the rest of the setting is in 14K white gold.
Trang Pham, GIA GG
Accredited Senior Gemologist, AGA
AGA Certified Gemological Laboratory #56