How To Value A Diamond
The single most important piece of advice all diamond buyers should know:
Never purchase a diamond based upon certificate grades alone.
Two diamonds with identical certificate grades are rarely equal in brilliance or value.
Example 1: The two diamonds below have identical GIA grades
Color: I Clarity: VS1
Polish: Excellent Symmetry: Excellent Cut: Excellent
Why is diamond B approximately 20% more valuable than Diamond A?
1.] Diamond ‘B’ has better proportion evident in the larger ‘face size’.
Diameter Measurements: A = 7.41mm: B = 7.58mm:
2.] Diamond ‘B’ is slightly whiter and more brilliant than ‘A’ even though both stones are graded GIA ‘I’ color.
Better and weaker examples of the same color grade is not unusual and must be taken into account when calculating correct value.
3.] The inclusions in diamond ‘A’ are located in the center (circled) whereas in diamond ‘B’ the inclusions are smaller and located towards the outside edge [circled bottom left].
Diamond ‘B’ is a more valuable example of a VS1 clarity grade.
At IQ every diamond is scrutinized for brilliance, proportion and correct value before being added to our inventory; less than 5% of all diamonds produced meet IQ’s demanding standards.
In rare instances other lab diamonds may be more valuable than a GIA stone with the same grades:
The diamonds below have identical grades from the GIA and EGL:
Color: I Clarity: VS1
We know GIA grades are stricter than EGL and some other labs and therefore it would seem reasonable to assume that the GIA diamond would be more valuable.
When we compare the 2 stones ‘side by side’ however, a different reality unfolds.
The GIA stone is considerably smaller than the EGL; clearly this diamond has been cut to maximize weight rather than ‘face size’ and brilliance.
The ‘face size’ on this GIA diamond is appropriate for a 1.75 carat rather than a 2.25 carat. Weight has been left on the underside of this diamond making it heavier but not larger where it matters [face size].
Please note that the GIA has given this diamond ‘Excellent’ Polish and Symmetry grades? Difficult to understand…
In contrast the EGL diamond on the right is beautifully cut, brilliant and has a face size that relates correctly to the carat weight.
A GIA certificate does not guarantee a diamond is cut, graded or valued correctly.
Select a knowledgeable diamond company with an impeccable reputation.
We invite you to visit IQ Diamonds where clients receive a detailed education from GIA Educated Professionals, competitive prices and make their selection from an unparalleled collection of diamonds.
Adamar Diamonds is happy to offer not only a wide selection of diamond engagement rings but also a selection of simple and secure payment options to all of our customers. We accept all major credit cards including VISA, Mastercard, American Express and Discover Card. We are also pleased to feature Square Payment systems which adds an extra layer of security to credit card transactions for our customers, and provides an electronic signature option. We can also offer emailed copies of all receipts for each transaction to our customers on every credit card purchase. At Adamar Diamonds we take pride in ensuring all credit card transactions are securely completed with the latest and best fraud protection procedures in place.
In addition to major credit cards, Adamar Diamonds will gladly accept bank drafts and personal cheques from our customers. With this payment method, however, we will hold your purchase items until the cheque or bank draft has been cleared by your financial institution. We will also accept secure Electronic Funds Transfers under the same secure payment arrangements.