Certified Lab-Grown Princess Diamonds
Frequently Asked Questions (FAQs)
The four sharp uncropped corners of a princess cut are exposed to setting pressure during prong placement and to impact in daily wear. V-prong settings, bezels and channel applications protect the corners effectively. LabGems advises evaluating corner setting before selection and holds IGI-certified princess cuts in active Antwerp inventory.
Princess cuts are the dominant shape for channel-set bands and eternity applications where corners are fully protected, while square radiant suits open prong-set engagement where corner durability matters. LabGems stocks both as IGI-certified options, including the cropped-corner square radiant, so buyers can match inventory to setting style.
Princess cuts at LabGems cover approximately 0.30ct through 4.00ct in Antwerp inventory, with premium grades on request. For matched calibrated runs in channel-set bands and eternity rings, 1ct melee parcels supply consistent smaller stones. Standard sizes ship within 1 business day; custom specifications within 7-10 business days, with a €500 minimum.
Yes. LabGems princess cuts can be filtered by carat, colour and clarity through the certified diamond search platform, which shows real-time Antwerp availability. This supports precise matching for channel and eternity production, where consistent colour and clarity across multiple stones is essential.
LabGems supplies princess cuts both IGI-certified and non-certified. Non-certified wholesale princess stock prices around 20% lower than certified equivalents, suiting eternity and channel production at volume. The non-certified princess range sits alongside the IGI-certified inventory dispatched from Antwerp, with in-stock stones shipping within 1 business day and custom orders within 7-10 business days.
Princess cut lab-grown diamonds combine brilliant-style faceting with a square perimeter, delivering high scintillation within clean geometric lines. As the second most popular shape historically for engagement rings and the premier choice for channel-set jewelry, princess cut inventory remains a core commercial requirement. For trade buyers, princess cuts offer excellent light performance and edge-to-edge alignment in multi-stone mountings. LabGems holds IGI-certified princess cuts in active Antwerp inventory across a full spectrum of weights and grades.
Sourcing and Specifications
Active Antwerp inventory typically spans princess cuts from approximately 0.30ct through 4.00ct across D to J color grades and VVS1 to SI2 clarity levels. All certified stock is accompanied by official IGI documentation detailing complete 4Cs evaluation, polish, symmetry, and precise facet proportions. In-stock orders dispatch within 1 business day following payment verification; custom specifications ship within 7 business days. A €500 minimum applies across all certified purchases. Filter real-time stock through the certified diamond search platform.
Corner Protection and Setting Considerations
The four pointed corners of a princess cut are uncropped, making them susceptible to chipping during setting or heavy daily wear. Jewellers should specify V-tip prongs, bezel frames, or channel mountings that encapsulate these vulnerable corners. For clients desiring a square profile with inherent corner durability, consider square radiant cuts, which feature cropped corners. Princess cuts perform exceptionally well in channel-set anniversary bands and eternity rings, where straight edges allow seamless stone-to-stone placement without metal gaps.
Evaluating Proportions and Symmetry
Length-to-width (L:W) ratio is critical when selecting princess cuts. A true square profile requires a L:W ratio between 1.00 and 1.05. Ratios exceeding 1.05 appear noticeably rectangular face-up, which can disrupt visual balance in solitaires or eternity bands. Symmetry is equally important: corner-to-corner alignment and facet reflection must be uniform to maintain brilliant scintillation across the entire table. For uncertified options or production melee, review the non-certified fancy shape collection or 1ct melee parcels.
Selection Notes for Princess Cuts
- Target 1.00–1.05 L:W ratio for ideal square geometry
- Prioritise V-prong, channel, or bezel settings to safeguard pointed corners
- Require Very Good or Excellent polish and symmetry for maximum scintillation
- Utilise for channel-set bands and eternity rings due to flush edge-matching
- Combine with other shapes to satisfy the €500 minimum purchase requirement