Princess Cut Lab-Grown Diamonds: Complete Buying Guide 2026
Quick Answer
Why choose a princess cut lab-grown diamond?
Princess cuts offer the best of two worlds: the maximum sparkle of a brilliant cut in a modern, geometric square shape. They cost 10–15% less than equivalent round brilliants. The clean lines look exceptional in modern solitaire and channel-set rings. Second most popular diamond shape globally after round.
📊 Princess cuts are the #2 most popular diamond shape (~18% of purchases). Lab princess cuts start from ~$320 for 0.5ct G/VS2 IGI. They cost 10-15% less than equivalent round brilliants.
Why Choose a Princess Cut?
The princess cut was developed in the 1960s as a way to achieve brilliant-level sparkle in a square shape — combining the geometric appeal of square cuts with the light performance of round brilliants. It succeeds on both counts.
- Brilliant sparkle: More fire and brilliance than any other square cut
- Modern geometry: Clean, square lines look contemporary and architectural
- Price advantage: 10–15% less than round brilliants for identical specs
- Versatile settings: Exceptional in solitaire, channel-set, and four-prong settings
Corner Protection — The Critical Consideration
The most important thing to know about princess cuts: the four sharp corners are the stone's most vulnerable points. A direct impact on a corner can chip even a diamond. This is a genuine risk if you have an active lifestyle or work with your hands.
Solution: Always use a setting with corner protection. The two best options:
- V-tip prongs: Four prongs positioned at the corners, each forming a V-shape that cradles and protects the corner. The standard choice for princess cut rings.
- Bezel setting: A metal rim that wraps completely around the stone, fully protecting all edges and corners. More protective but hides more of the diamond.
Ideal Proportions
| Proportion | Ideal Range |
|---|---|
| L/W Ratio | 1.0–1.05 (square); 1.05–1.15 (slightly rectangular) |
| Depth | 65–75% |
| Table | 65–75% |
| Color | G–H (facets show color similarly to round) |
| Clarity | VS2–SI1 (facets hide inclusions well) |
Pricing — 1ct Princess G/VS2 IGI
| Retailer | 1ct Princess G/VS2 | vs Round |
|---|---|---|
| Clean Origin | $800–$1,050 | ~12% cheaper |
| James Allen | $850–$1,150 | ~12% cheaper |
| Brilliant Earth | $950–$1,300 | ~12% cheaper |
| Blue Nile | $900–$1,200 | ~12% cheaper |