The Truth about Lab Grown Diamonds

In this article, we break down the facts about lab-grown vs natural diamonds, dispel common myths, and share everything you need to know before you buy.

Are Lab-Grown Diamonds Real?

Yes—lab-grown diamonds are 100% real diamonds.

Chemically, physically, and optically, lab-created diamonds are identical to those mined from the earth. The only difference is origin. Lab diamonds are formed in controlled environments using either High Pressure High Temperature (HPHT) or Chemical Vapour Deposition (CVD) methods, rather than over billions of years underground.

To clarify:

• Lab-Grown = Real Diamond

• Imitation Diamonds (like Cubic Zirconia or Moissanite) = Simulants

Just as ice from your freezer is real ice (even if it didn’t come from a mountain), a lab-grown diamond is real—it simply had a different journey. Ice from your freezer is ice and ice from a glacier is ice the same with Lab-Grown Diamonds they are chemically and visually identical to natural diamonds – pretty cool right?

Lab-created diamonds are also laser-inscribed and fully disclosed as “laboratory grown” to ensure consumer transparency.

Are Lab Diamonds More Ethical or Eco-Friendly?

This is where things get nuanced.

The jewellery industry often markets lab-grown diamonds as more ethical or sustainable. While it’s true they don’t require traditional mining, the energy consumption involved in creating them is significant—reaching temperatures over 1,500°C and taking up to 4 weeks for a 1-carat stone. Many lab diamond producers are based in countries where clean energy sources are not the norm.

In contrast, natural diamond mining today is highly regulated and environmentally restored. Most mines rehabilitate sites into lakes or ecosystems once operations cease. Thanks to the Kimberley Process, over 99% of natural diamonds are certified conflict-free.

So, while lab-grown diamonds avoid mining, they are not automatically more sustainable or ethical. It depends on the producer and the energy source used.

Will a Lab-Grown Diamond Hold Its Value?

This is a key question—and we’ll be honest: resale value for lab-grown diamonds is still evolving.

Unlike natural diamonds, which have a long-standing history of appreciating in value, lab-grown diamonds are newer to the market. With mass production increasing and technology advancing, prices may decline over time.

However, most clients purchasing a lab-grown diamond aren’t doing so as an investment. They’re buying for love, beauty, and to create an amazing diamond ring. If you don’t plan on reselling it, a lab-grown diamond offers incredible brilliance and value for money.

All Polished Diamonds stones—natural or lab-grown—are independently certified by internationally recognised bodies like IGI or GIA, and come with full documentation for peace of mind.

Why Choose Polished Diamonds for Your Lab-Grown Diamond?

• We provide full certification and transparency with every diamond.

• Our rings are custom-made to suit your style and budget.

• You’ll receive personal service from experts who genuinely care.

• All diamonds are hand-selected and approved by you before setting.

Whether you’re in Auckland, Wellington, Christchurch, or browsing online, our team is here to help you make the perfect choice.

Final Thoughts

Lab-grown diamonds offer real sparkle, stunning beauty, and excellent value—but they’re not automatically greener or better. The right choice comes down to your values, budget, and preferences.

At Polished Diamonds, we’re here to help guide you—without pressure—so you feel confident, informed, and proud of your decision.

📞 Contact us today to learn more about lab-grown diamonds or visit one of our showrooms.