Knowing the 4 "Cs" is NOT enough to "price" a diamond accurately. Not all Gemological labs are the same. Most smaller gem labs are extensions of local jewellery stores, created solely for the purpose of raising the image of the store's inventory. Such labs are hardly unbiased and the certificates accredited by them are rarely accurate. If you want an honest assessment of a diamond's true quality, avoid any lab that is not one of these listed below:


What They Are
Gemological Institute of America
The most widely respected laboratory in the world today. Diamonds with a GIA cert are often priced 2-5% higher. GIA is known for its reliability in grading. All labs can make a mistake, but GIA labs are truly unbiased and among the most conservative and consistent.

American Gemological Society

This is the only large, nationally respected lab that assigns a grade to the overall cut of a diamond. Certificates from AGS are often used for all Ideal Cuts, and describe all the details of the cut to verify perfect proportions. If you want a perfect cut above anything else, you should insist on an AGS cert.
American Gemological Laboratory
This lab is best known for its work in the coloured stone industry, working to provide expert assessments of gemstone identification, treatments, and enhancements. The diamond certificates have recently gained a reputation as being consistent and conservative.

Hoge Raad voor Diamant (Diamond High Council)

This lab is supported by the Belgium government and enjoyed almost the same reputation as GIA, known for its stringent standard in diamond colour grading.


Other labs do not enjoy the same reputation and popularity as those listed above, and therefore will not command as much value if you ever need to sell the diamond. In the worst scenario, other labs will not grade the diamond properly and you are not receiving the actual quality of diamond you want. In most cases, you will end up paying too much for a diamond of lesser quality with certificates from other labs.


Background on Ideal Gems

Based in Singapore and specialising in custom-make diamond jewelleries, we are dedicated to providing quality products at very competitive prices.

Our services:

§ Free Professional Consultation
§ Jewellery Designing & Customising
§ Supplier's Pricing For Diamonds & Precious Stones
§ Wholesale
§ Deals With All Internationally Certified Diamonds: GIA, AGS, HRD

The Ideal diamond coupled with your own unique design for your loved ones

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