Certified Lab-Grown Square Cushion Diamonds | LabGems Antwerp
Square cushion lab-grown diamonds are the vintage-positioned member of the square-shape family. Unlike princess cuts (sharp corners, contemporary geometry) or square radiants (cropped corners, contemporary brilliance), square cushions feature softly rounded corners that read as romantic and heritage-inspired. The cut suits Edwardian, Art Nouveau, and antique-revival retail positioning where the square outline is desired but contemporary sharpness is not. LabGems holds IGI-certified square cushion cuts in active Antwerp inventory.
Sourcing and Specifications
Active Antwerp inventory includes square cushion cuts from approximately 0.30ct through 4.00ct, with both modified brilliant and standard cushion faceting represented. All certified stock is supplied with IGI documentation. Standard sizes ship within 1 business day; custom specifications ship within 7 business days. A €500 minimum applies across all certified purchases. For elongated cushion proportions outside the 1.00-1.05 ratio, see the broader certified cushion cut inventory.
Distinction from Princess and Square Radiant
Three shapes occupy the certified square-profile category, each with distinct commercial positioning. Princess cuts feature sharp uncropped corners, modern geometric character, and require V-prong corner protection — they suit contemporary engagement and channel applications. Square radiant cuts feature cropped corners, brilliant faceting, and contemporary scintillation — they suit setting-flexible contemporary applications. Square cushions feature softly rounded corners, vintage-romantic character, and pair with heritage retail positioning. Trade buyers carrying all three capture distinct audiences; carrying only one limits the commercial range. The selection between square cushion and the other two is fundamentally a retail-positioning decision, not a specifications comparison.
Modified Brilliant or Standard Faceting
Square cushions are available in both modified brilliant (cushion brilliant) and standard cushion (cushion antique) faceting. Modified brilliant produces heightened scintillation through additional facets beneath the table — suiting contemporary-vintage hybrid positioning. Standard cushion preserves broader chunky facets that reference old-mine cut antique diamonds — suiting strict heritage and Edwardian-revival positioning. The faceting choice is more consequential for square cushions than for elongated cushions, because the square outline emphasises the faceting language more visibly. Retailers committed to authentic vintage positioning should prioritise standard cushion faceting; retailers serving contemporary clients with vintage tastes benefit from modified brilliant.
Heritage Retail Positioning
Square cushion cuts perform commercially in heritage and antique-revival retail contexts. Edwardian, Belle Époque, and Art Nouveau-inspired engagement collections suit the cut's romantic geometry. Milgrain detailing, scalloped pavé bands, and hand-engraved settings enhance the vintage character. Three-stone configurations with smaller square cushion or trapezoid sides produce cohesive heritage compositions. For coloured square cushion alternatives in heritage settings, the coloured lab-grown diamonds collection includes yellow and pink saturations.
Selection Notes for Square Cushion Cuts
- Strict L:W ratio 1.00-1.05 for true square presentation
- Faceting choice (modified brilliant vs standard) drives retail positioning
- Excellent or Very Good symmetry for balanced corner-to-corner geometry
- Heritage retail positioning converts more reliably than contemporary
- Distinct commercial position from princess and square radiant — stock all three for full coverage
Frequently Asked Questions (FAQs)
All three are square shapes, but they suit different retail positioning. Princess cuts are contemporary with sharp corners and require V-prong protection. Square radiant cuts are contemporary with cropped corners. Square cushions are vintage-positioned with softly rounded corners.
Modified brilliant for contemporary clients with vintage tastes — heightened scintillation. Standard cushion for authentic heritage and Edwardian-revival positioning — broader chunky facets.
Yes. Square cushions feature in the coloured lab-grown diamonds collection across yellow and pink saturations. Cushion-family shapes are commercially strong in fancy colour.
A €500 combined minimum applies across all certified diamond purchases. Square cushion cuts can be combined with other shapes from active inventory to meet this minimum.
Vintage and heritage retail positioning converts most reliably. Square cushion suits Edwardian, Art Nouveau, and antique-revival collections more than contemporary engagement.