Are Lab Grown Diamonds Lower Quality?

If you’ve heard about lab grown diamonds, you might be wondering: are they lower quality than natural, mined diamonds? The short answer is no—but the full explanation reveals why this misconception persists and how lab diamonds truly compare.

In this article, we’ll explore the science behind lab grown diamonds, debunk common myths, and explain how quality is measured. If you're considering one for an engagement ring or custom piece, understanding the facts behind the sparkle is essential.

Myth: Lab Diamonds Are “Fake” or “Cheaper Quality”

This is one of the most common misunderstandings. Lab grown diamonds are not fake, and their quality is not inherently lower than mined diamonds. In fact, they are 100% real diamonds, with the same:

• Crystal structure

• Hardness (10 on the Mohs scale)

• Refractive index (brilliance)

• Thermal conductivity (how diamonds disperse heat)

Lab and mined diamonds are indistinguishable without specialised equipment. Even professional jewellers rely on advanced testing tools to tell them apart.

How Is Diamond Quality Measured?

All diamonds—lab grown or mined—are graded using the same global standard: the Four Cs.

1. Cut – How well the diamond reflects light

2. Colour – The absence of yellow/brown tint

3. Clarity – The visibility of internal or external flaws

4. Carat – The diamond’s weight

These aspects are assessed by professional gem labs like IGI and GIA.

✅ Yes, lab diamonds come with official certificates

Each certified lab diamond includes its own unique report detailing the Four Cs and origin (lab vs mined). At Diamond Lab, all our lab grown diamonds are IGI or GIA-certified.

So, Are Lab Diamonds Flawless?

No diamond—lab or mined—is guaranteed to be flawless. Just like natural diamonds, lab grown ones can form with tiny inclusions or imperfections. That’s part of what makes each diamond unique.

However, lab conditions are highly controlled, meaning manufacturers can achieve consistently high clarity and colour grades. That’s why it’s common to see more lab diamonds with VVS (Very Very Slightly Included) or even IF (Internally Flawless) grades.

💎 Curious to see a refined lab diamond design?
Check out the Elysian Marquise Solitaire Ring – available with your choice of GIA/IGI-certified lab diamond.

Durability: Do Lab Diamonds Last as Long?

Absolutely. Lab grown diamonds are just as durable as mined diamonds. Both score a 10/10 on the Mohs scale of hardness and are suitable for daily wear, including engagement rings and heirloom pieces.

They are resistant to:

• Scratching

• Chipping (with reasonable care)

• Heat and chemical damage

In short, lab grown diamonds will last a lifetime, just like natural ones.

Why Do Some People Think They're Lower Quality?

The confusion often stems from:

• Price differences: Lab diamonds are more affordable—not because they’re lower quality, but because supply chains are shorter and mining isn’t involved.

• Association with simulants: People often confuse lab diamonds with cubic zirconia or moissanite, which are not real diamonds.

• Lack of awareness: Lab diamonds are still relatively new in mainstream jewellery, and some myths take time to correct.

Final Thoughts: Are Lab Grown Diamonds Lower Quality?

No. Lab grown diamonds offer:

✔ The same brilliance, hardness, and structure
✔ Independent grading from trusted gem labs
✔ High clarity and colour due to advanced technology
✔ A lower environmental impact and ethical sourcing

They’re not just equivalent—they’re often superior in value and more aligned with modern values.

Learn More or Book a Private Consultation

Want to compare lab diamonds in person or discuss customisation options with an expert? We welcome you to reach out.

📍 Visit our Perth showroom or book online:
👉 Contact Diamond Lab

We’re here to help you make an informed, confident, and meaningful choice.