Wholesale 4 Carat Lab Grown Diamonds
Source rare, high-clarity 4 carat loose lab grown diamonds directly from our production facility. GIA/IGI certified. Perfect for custom luxury jewelry.
Why Source 4 Carat Lab Grown Diamonds From Us?
4 Carat Diamond Millimeter (mm) Reference Table
| Diamond Shape | Average Dimensions (mm) | Ideal Cut Depth % | Ideal Table % |
|---|---|---|---|
| Round | 10.2 mm x 10.2 mm | 60% – 62.5% | 54% – 57% |
| Oval | 12.0 mm x 8.5 mm | 62% – 66% | 53% – 63% |
| Princess | 9.0 mm x 9.0 mm | 68% – 74% | 64% – 75% |
| Emerald | 10.5 mm x 7.5 mm | 60% – 70% | 60% – 68% |
| Pear | 13.5 mm x 8.5 mm | 58% – 64% | 53% – 63% |
| Radiant | 10.5 mm x 8.0 mm | 61% – 69% | 61% – 69% |
| Marquise | 16.0 mm x 8.0 mm | 58% – 64% | 53% – 63% |
| Asscher | 9.0 mm x 9.0 mm | 61% – 68% | 61% – 69% |
| Cushion | 9.5 mm x 9.5 mm | 61% – 68% | 56% – 65% |
FAQ About Wholesale 4 Carat Lab Grown Diamonds
How many days does it take to grow a 4-carat rough diamond crystal?
Depending on whether CVD or HPHT is deployed, growing a raw crystal large enough to yield a polished 4ct diamond requires approximately 3 to 5 weeks of continuous, uninterrupted machine cycles.
What is the average millimeter footprint of a 4-carat Oval cut diamond?
A properly cut 4-carat Oval cut diamond spreads beautifully at approximately 12.0 mm by 8.5 mm.
Which shapes are best for maximizing the visual weight of a 4ct stone?
Pear, Marquise, and elongated Radiant cuts offer a larger physical face-up size per carat weight compared to Round or Princess cuts.
Can these 4ct lab grown diamonds pass standard diamond thermal testers?
Yes. Because they are 100% crystallized pure carbon, they exhibit identical thermal and electrical conductivity to mined diamonds and pass standard tester pens easily.
What inclusions are common in 4-carat CVD diamonds, and how do you filter them?
CVD diamonds may sometimes show pinpoints or tiny non-diamond carbon spots. Our quality control team filters out stones with localized black inclusions, selecting only evenly distributed, microscopically small pinpoints that remain invisible to the eye.
Are your 4ct diamonds suitable for luxury high-jewelry centerpieces?
Absolutely. Our 4ct stones are sought after by international fine jewelry boutiques due to their exquisite fire and uncompromised light performance under various lighting conditions.
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