Discover Lab-Grown Diamonds – Identical Beauty, Better Value

Lab-Grown Diamonds – Ethical, Brilliant, and Certified

Lab-Grown Diamonds offer the same exceptional brilliance, durability, and prestige as their natural counterparts, at a fraction of the cost. Scientifically identical in chemical, physical, and optical composition, these diamonds are grown in advanced laboratories rather than formed underground, resulting in a diamond that is both ethical and sustainable.

Why Choose a Lab-Grown Diamond?

• Chemically and physically identical to natural diamonds

• Certified by leading gemological institutes, including IGI, with laser inscriptions for traceability

• Excellent value, typically 25% of the cost of a mined diamond of equivalent size and quality

• Sustainably and ethically produced, offering a clean and environmentally conscious choice

• Perfect for engagement rings and fine jewellery, with premium cut, colour, and clarity options

Our Lab Diamond Standards

Polished Diamonds offers an extensive selection of high-quality lab-grown diamonds in nearly every size, shape, and grade. Our default standard features:

• D–F Colour (colourless, exceptional white)

• VS2 Clarity (eye-clean, excellent brilliance)

• Excellent Cut for maximum sparkle and fire

• Certification by IGI (International Gemological Institute)

• Laser-inscribed girdle marking to distinguish from natural diamonds.

These gemstones are rated 10 on the Mohs hardness scale, and are identical to natural diamonds, ensuring superior durability and resistance to scratching or dulling over time. They are not to be confused with simulants like Cubic Zirconia or Moissanite, which lack the lasting brilliance and hardness of true diamonds. As we often say, lab diamonds are like ice from a freezer, while natural diamonds are like ice from a glacier, visually identical, with the same structure and purity, only differentiated by origin.

Customisation & Setting Options

Every lab-grown diamond we stock can be set into your preferred ring design, whether for engagement, wedding, or everyday wear. Explore our full range online or in-store, and let our diamantaires guide you in creating your perfect piece.

****************************************************************************************************************************

Lab-Grown Diamond FAQ

Frequently Asked Questions regarding Lab Grown Diamonds from GIA Qualified Professional Jewellers at Polished Diamonds Jewellery Design. We answer your questions about buying Lab-Grown Diamonds in Auckland, Wellington, or Christchurch. Visit our store network and speak with our design team. Lab-grown diamonds are excellent value, and some considerations are listed below:

What are lab-grown diamonds?

Lab-grown diamonds are real diamonds created in a controlled laboratory environment. They have the same chemical composition, brilliance, and durability as natural diamonds, making them a popular and ethical alternative.

Are lab-grown diamonds real?

Yes — lab-grown diamonds are 100% real diamonds. They are graded by IGI and GIA using the same standards applied to mined diamonds.

Why choose a lab-grown diamond?

Lab-grown diamonds offer exceptional value, ethical sourcing, and high quality. They are up to 70% more affordable, allowing buyers to choose a larger or higher-spec stone.

Do lab-grown diamonds look different to natural diamonds?

No. Lab-grown diamonds look identical to mined diamonds and share the same fire, sparkle, and clarity. Only specialised equipment can distinguish them.

How are lab-grown diamonds made?

Two methods are used to create lab-grown diamonds:

• CVD (Chemical Vapour Deposition) – produces high-clarity diamonds.

• HPHT (High Pressure High Temperature) – replicates natural diamond formation.

Are lab-grown diamonds ethical and sustainable?

Yes. Lab-grown diamonds avoid traditional mining, making them a more environmentally friendly and ethically sourced option.

Do lab-grown diamonds come with certification?

All Polished Diamonds lab-grown diamonds are IGI-certified and laser-inscribed for complete authenticity and transparency.

Are lab-grown diamonds durable?

Yes. Lab-grown diamonds are rated 10 on the Mohs hardness scale, the same as natural diamonds, making them ideal for engagement rings and long-term wear.

Will a lab-grown diamond hold its value?

Lab-grown diamonds provide exceptional beauty and quality for budget-conscious buyers. Like most jewellery, long-term resale values vary based on market demand.

Can I insure a lab-grown diamond ring?

Yes. Lab-grown diamond rings can be insured the same way as natural diamond rings. Your valuation certificate will be accepted by insurance providers.

Can you supply any shape, size, or quality?

Yes — we can source any diamond shape, including Round, Oval, Pear, Emerald, Cushion and more, in any carat weight, colour, clarity, and cut grade.

How long does it take to make a lab-grown diamond ring?

Polished Diamonds can custom-design and produce any ring within 1–2 weeks using CAD, 3D printing, precision casting, and expert setting.

Can I view lab-grown diamonds in-store?

Yes — visit our Christchurch, Wellington, or Auckland studios or book a virtual appointment to view diamond options in real time.