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3 Carat Lab Grown Diamond

Select a 3ct diamond from the thousands of certified lab diamonds in our collection.
Call us today: 020 35852295

Looking To Buy a 3 carat Lab Diamond?

Search through our inventory below or book a visit to our London Showroom.

  • Round Round

  • Princess Princess

  • Cushion Cushion

  • Emerald Emerald

  • Pear Pear

  • Oval Oval

  • Marquise Marquise

  • Radiant Radiant

  • Asscher Asscher

  • Heart Heart

  • European Cut European Cut

  • Old Miner Old Miner

  • Rose Rose

  • Briolette Briolette

  • Bullets Bullets

  • Calf Calf

  • Flanders Flanders

  • Half Moon Half Moon

  • Hexagonal Hexagonal

  • Kite Kite

  • Lozenge Lozenge

  • Octagonal Octagonal

  • Pentagonal Pentagonal

  • Shield Shield

  • Square Square

  • Star Star

  • Tapered Baguette Tapered Baguette

  • Baguette Baguette

  • Tapered Bullet Tapered Bullet

  • Trapezoid Trapezoid

  • Triangular Triangular

  • Trilliant Trilliant

  • Other

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3 Carat Lab-Grown Diamonds

Carat Weight

A 3-carat diamond is an exquisite choice for engagement rings and statement jewellery, offering a striking presence and brilliance.

Lab-Grown Diamonds

Lab-grown diamonds are real diamonds created in a controlled laboratory environment rather than being formed deep within the Earth’s crust. They are physically, chemically, and optically identical to mined diamonds, making them an ethical and cost-effective alternative. Even expert gemologists cannot distinguish between lab-grown and earth-grown diamonds without specialised equipment.

The only difference between lab-grown and mined diamonds is their origin. While natural diamonds form under extreme pressure and heat over millions of years, lab-grown diamonds are produced using High Pressure High Temperature (HPHT) or Chemical Vapour Deposition (CVD) methods in a controlled setting.

Lab-grown diamonds are typically 30 to 50 per cent more affordable than mined diamonds, allowing you to choose a larger stone within your budget without compromising on quality.

All Reve Diamonds’ lab-grown diamonds are independently certified, with most graded by IGI or GIA, two of the most respected diamond certification bodies.

If you need help selecting your perfect 3-carat lab-grown diamond, contact us today on 020 35852295 or chat with us now.

Frequently Asked Questions

-How much does a 3-carat lab-grown diamond cost?

A 3-carat lab-grown diamond can cost anywhere between £2,500 and £20,000, depending on the 4 Cs (Carat, Cut, Colour, and Clarity).

-How much does a 3-carat diamond weight?

A 3-carat diamond weight 0.6 grams or 600 milligrams.

-How big is a 3-carat diamond?

3-carat diamonds vary in size, as carat is a measure of weight rather than dimension. Below is a range of dimensions for a 3-carat diamond:

Measurement Low High Median
Length (mm) 8.5 12.5 9.8
Width (mm) 8.3 11.2 9.5
Depth (mm) 4.9 7.5 6.5
Length-to-Width Ratio 1.0 1.5 1.2