The Four C’s


Understanding the 4 C’s of Diamonds

Choosing a diamond can feel overwhelming, but the Four C’s remain the foundation for understanding quality and beauty — particularly for natural diamonds.

1. Cut

Cut determines how a diamond reflects light — creating brilliance, sparkle, and life.
A beautifully cut diamond will always stand out, regardless of size.

2. Colour

Diamonds are graded from colourless to light yellow.
The less colour, the rarer the diamond — but we always guide you to the best balance of beauty and value.

3. Clarity

Clarity refers to natural inclusions within the stone.
Most are not visible to the naked eye, which is why we focus on eye-clean diamonds that look flawless without unnecessary cost.

4. Carat

Carat is the weight of the diamond.
While size is important, it’s the combination of all four C’s that determines how a diamond truly looks.

Lab-Grown Diamonds & Changing Grading Standards

Lab-grown diamonds are still real diamonds, but the way they are graded and valued is now evolving.

Traditionally, lab-grown diamonds were graded using the same Four C’s as natural diamonds. However, the Gemological Institute of America (GIA) has recently changed its approach.

  • GIA is moving away from the traditional 4 C’s grading system for lab-grown diamonds

  • Instead, they are introducing broader categories such as “Premium” and “Standard” (The Times of India)

  • This shift reflects the fact that most lab-grown diamonds fall within a much narrower range of colour and clarity compared to natural diamonds (Financial Times)

What this means for you

  • Many existing lab-grown diamonds still come with full 4 C grading reports (especially from IGI or older GIA certificates)

  • Moving forward, lab-grown diamonds may no longer be graded in the same detailed way

  • Some stones may receive simplified reports — or no traditional grading at all

Other laboratories, such as the International Gemological Institute (IGI), continue to use the full 4 C’s system for lab-grown diamonds 

Natural vs Lab-Grown — A Subtle Shift

This change highlights an important difference:

  • Natural diamonds: valued for rarity, formed over billions of years, and consistently graded using the 4 C’s

  • Lab-grown diamonds: more uniform in quality, more price-accessible, and increasingly treated as a separate category in the market

The Mandi & Co. Difference

We believe it’s not just about the Four C’s — it’s about choosing the right diamond for you.

Our Fifth C: Commitment

We guide you honestly through both natural and lab-grown options, helping you understand not just how a diamond looks today — but how it holds value, meaning, and significance over time.