The 5th C Most Jewellers Won’t Tell You About

It's far more important than you think.


Say hello to the 5th C

A diamond is a diamond is a diamond. Right? Wrong. One of the first few things people learn about diamonds is that not all of them are created equally. You know you have to consider the 4Cs (carat, cut, colour and clarity) before making a decision. But there is another C that is often overlooked — certification — which guarantees that all the other Cs are truly what they claim to be. If you are scared of getting ripped off, don’t worry. We’ll teach you everything you need to know about possibly the most important C.

International certification vs in-house certification

Just like the shiny stones themselves, not all diamond certifications are the same. International certifications tend to be more stringent, while in-house certifications are typically more lenient. For instance, an in-house diamond grading lab could call one colour grade “G”, while an international one could call that exact same colour “H”. This is completely acceptable, as long as it is done consistently. Still, just because a lab is consistent in its grading, doesn’t mean that it is trustworthy. This is why most established jewellers offer rocks certified by the standard-bearer of the diamond certification industry, the Gemmological Institute of America (GIA).

The best diamonds are GIA-certified

Established in 1931, the GIA is the most respected and renowned international diamond grading lab. Why? Well, apart from the fact that they are incredibly consistent, they are also a non-profit entity dedicated to the research and education of gems and jewellery. They have absolutely no financial stake in the sale of diamonds. Furthermore, every diamond certified by them has to be viewed by four expert gemmologists, so inaccurate gradings are close to impossible. This begs the question — why would anyone not want to get their diamond GIA-certified?

Why some jewellers don’t choose the GIA

The biggest reason is that it takes a while for a diamond to get through the GIA’s system. However, unethical jewellers will claim that it costs a lot more to send the diamond to the GIA. Do not be fooled. This is merely to sell low-quality diamonds that have not gone through rigorous grading. With in-house certificates, jewellers can call the diamond whatever they want so that it can be better marketed. Results are manipulated to a higher grade with a lower price, giving the illusion that they are offering you an incredible deal. Our advice? Stick with diamonds graded by the GIA. This way, you’ll enjoy peace of mind, know exactly what you are paying for and own a diamond that has been accurately described. Nothing more. Nothing less.

Get GIA-certified diamonds at Luxiee