Are you looking to buy a lab-grown loose diamond or engagement ring? Select from the thousands of certified diamonds in our collection. Lab-grown diamonds are chemically, physically, and optically identical to mined diamonds — available at 50–70% less than the cost of a naturally mined stone.
A 4-carat diamond makes an exceptional statement piece, perfect for engagement rings and other fine jewellery.
Lab-grown diamonds are real diamonds created in a laboratory rather than deep within the Earth's crust. They are physically, chemically, and visually identical to earth-grown diamonds and indistinguishable, even to a trained gemologist.
The only difference between lab-grown and earth-grown diamonds is their origin. Earth-grown diamonds form under extreme pressure and temperature beneath the Earth's surface, whereas lab-grown diamonds are created under high pressure and temperature (HPHT) in a controlled laboratory environment.
Lab-grown diamonds are typically 30 to 50 per cent more affordable than earth-grown diamonds. This makes them a popular choice for engagement rings, allowing you to select a larger diamond within your budget.
All Reve Diamonds lab-grown diamonds are certified. Most of our lab-grown diamonds are certified by IGI or GIA, the most respected independent diamond grading laboratories.
If you need assistance selecting your 4-carat lab-grown diamond, contact us today on 020 35852295 or chat with us now.
A 4-carat lab-grown diamond can cost between £6,000 and £35,000, depending on the 4 Cs (Carat, Cut, Colour, and Clarity).
A 3-carat diamond weight 0.8 grams or 800 milligrams.
4-carat diamonds vary in dimensions since carat is a measure of weight rather than size. Below is a range of dimensions for a 4-carat diamond:
| Measurement | Low | High | Median |
|---|---|---|---|
| Length (mm) | 8.5 | 11.6 | 10.2 |
| Width (mm) | 8.2 | 11.2 | 10.0 |
| Depth (mm) | 5.5 | 7.5 | 6.5 |
| Length-to-Width Ratio | 1.0 | 1.5 | 1.2 |
