Round Brilliant Cut
Dimension table (unit: mm)
| carat | Diameter range | Depth range |
| 1ct | 6.3–6.5 | 3.8–4.2 |
| 2ct | 8.0–8.2 | 4.9–5.3 |
| 3ct | 9.1–9.3 | 5.6–6.0 |
| 5ct | 10.8–11.1 | 6.7–7.2 |
Advantages:
- Best light performance
- Highest resale value
- Larger face-up size
Princess Cut
Square scale 1.00-1.05
| carat | Diameter range | Depth range |
| 1ct | 5.5×5.5 | 3.9–4.3 |
| 3ct | 8.1×8.1 | 5.8–6.2 |
| 5ct | 10.2×10.2 | 7.0–7.5 |
Advantages:
- Modern geometric appeal
- Higher yield from rough
- Lower price per carat
Emerald Cut
(Aspect ratio 1.30-1.50)
| carat | Diameter range | Depth range |
| 1ct | 7.0×5.2 | 3.5–4.0 |
| 3ct | 8.8×6.5 | 4.3–4.8 |
| 5ct | 12.5×9.3 | 6.0–6.6 |
Advantages:
- Art Deco elegance
- Hides color tint
- Elongated appearance
Oval Cut
Aspect ratio 1.30 - 1.50
| carat | Diameter range | Depth range |
| 1ct | 8.2×5.5 | 3.6–4.1 |
| 3ct | 10.8×7.3 | 5.2–5.7 |
| 5ct | 13.2×8.9 | 6.3–6.9 |
Advantages:
- Slimming effect
- Balanced brilliance
- Popular in haute joaillerie
Pear Cut
Aspect ratio 1.45-1.65
| carat | Diameter range | Depth range |
| 1ct | 9.0×5.8 | 3.3–3.8 |
| 3ct | 11.2×7.1 | 4.1–4.6 |
| 5ct | 15.5×9.8 | 5.8–6.4 |
Advantages:
- Romantic symbolism
- Longest face-up length
- Versatile setting options
Cushion Cut
Square Scale 1.00-1.15
| carat | Diameter range | Depth range |
| 1ct | 6.0×5.8 | 3.9–4.4 |
| 3ct | 8.5×8.2 | 5.6–6.1 |
| 5ct | 10.3×9.9 | 6.8–7.3 |
Advantages:
- Victorian-era charm
- Hides inclusions
- Soft scintillation
（67.5 Carat Radiant Cut Lab Grown Ruby Loose Stone （Customized for Mr. Bruce in the UK）
Conclusion
Pursuit of fire color：Round/Oval for brilliance
Budget prioritization：Princess/Cushion for value
Personality Expression.：Emerald/Pear for uniqueness
All diamond sizes are GIA standard cut ranges, actual data for lab-grown diamonds may fluctuate ±3% due to cutting ratios, and in the case of colored gemstones and moissanites, the ratios will vary even more!
We offer customized cutting services for different lab cultivated gemstones of different carats, you need to contact us!