Diamond Terminology

Buying a diamond doesn’t have to feel overwhelming. Once you understand the 4 C’s, you’ll know exactly what you’re paying for - and what actually matters to you.

The 4 C’s stand for:

  • Cut

  • Colour

  • Clarity

  • Carat

Let’s break them down in simple terms.

 

1. Cut – The Sparkle Factor

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Cut is the most important of all the C’s.
It’s what makes a diamond sparkle.

Cut doesn’t mean shape (round, oval, emerald etc). It refers to how well the diamond has been cut and proportioned to reflect light.

A well-cut diamond:

  • Reflects light beautifully

  • Looks bright and fiery

  • Sparkles from every angle

A poorly cut diamond:

  • Can look dull or glassy

  • May appear darker in the centre

What we recommend:
Always prioritise cut. An Excellent or Ideal cut will make even a smaller diamond look more impressive than a larger one with a poor cut.

 

2. Colour – How White Is It?

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Diamond colour is graded from D (completely colourless) down to Z (noticeably yellow/brown).

To the naked eye, most people cannot tell the difference between:

  • D, E, F (Colourless)

  • G, H (Near colourless)

💡 In real life:

  • G or H colour often looks beautifully white once set in a ring.

  • You usually don’t need to pay for a D unless you want the absolute highest grade.

What we recommend:
For the best balance of beauty and value, G–H colour is perfect for most engagement rings.

 

3. Clarity – Natural Marks Inside The Diamond

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Clarity refers to tiny natural marks inside the diamond called inclusions.

All diamonds form under pressure — so small internal marks are completely normal.

Clarity grades range from:

  • FL / IF (Flawless)

  • VVS

  • VS

  • SI

  • I

But here’s what actually matters:

👉 Can you see it with your eyes?

Many VS and even some SI diamonds are “eye-clean”, meaning you cannot see any inclusions without magnification.

What we recommend:
VS1 or VS2 clarity is a sweet spot. Beautifully clean without overpaying for microscopic perfection.

4. Carat – The Size

Carat simply refers to weight, not sparkle.

A higher carat:

  • Means a larger diamond

  • Increases the price significantly

But size isn’t everything.

A well-cut 1.00ct diamond can look more impressive than a dull 1.50ct.

What to consider:

  • Your finger size

  • The setting style

  • Your budget

  • Whether you prefer size or sparkle

 

💍 What Should You Prioritise?

If you’re unsure, here’s a simple guide:

1️⃣ Prioritise Cut
2️⃣ Choose a colour that looks white to your eye (G–H is perfect for most)
3️⃣ Aim for eye-clean clarity (VS range is ideal)
4️⃣ Choose a carat weight that suits your style and budget

 

🌱 Lab Grown vs Natural Diamonds

Both follow the exact same 4 C grading system.

  • Lab grown diamonds are chemically and visually identical to natural diamonds.

  • They simply have a different origin.

  • They often allow you to go bigger or higher quality within the same budget.