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Check out these collections.

3 to 3.99 Carat

Cushion Cut Lab Grown Diamond - 3.68CTW G/VS1 (TV413)
Cushion Cut Lab Grown Diamond - 3.68CTW G/VS1 (TV413)
Save 70%

Cushion Cut Lab Grown Diamond - 3.68CTW G/VS1 (TV413)

Regular price 1,785 536

Unit price
per 

Emerald Cut Lab Grown Diamond - 3.28CTW D/VVS2 (TV812)
Emerald Cut Lab Grown Diamond - 3.28CTW D/VVS2 (TV812)
Save 70%

Emerald Cut Lab Grown Diamond - 3.28CTW D/VVS2 (TV812)

Regular price 2,111 633

Unit price
per 

Radiant Cut Lab Grown Diamond - 3.78CTW G/VVS2 (TV427)
Radiant Cut Lab Grown Diamond - 3.78CTW G/VVS2 (TV427)
Save 70%

Radiant Cut Lab Grown Diamond - 3.78CTW G/VVS2 (TV427)

Regular price 2,058 617

Unit price
per 

Wholesale Enquiries

We are manufacturers, exporters and suppliers for fine quality Raw diamonds, gemstones, gemstone beads, briolettes, cabochons, chips, sterling silver jewelry and handcrafted beaded jewelry. 

Please message us for any wholesale queries or customised orders. Keep seeing new additions every day.

A 3 to 3.99 carat diamond is a rare purchase by nature, and GDBS treats it that way with hands-on sourcing instead of a warehouse catalog approach.

  • Honest inventory, not padded listings. Our 3 to 3.99 carat lab grown diamonds collection stays intentionally small because stones at this weight are genuinely limited, and every one listed is graded individually rather than pulled from generic stock photos.
  • Full grading transparency on rare stones. The cushion, emerald, and radiant cuts currently available list exact carat weight, color (D to G), and clarity (VS1 to VVS2), so a stone this significant is never a guessing game.
  • Deep discounts even at this size. Regular prices are shown struck through against the current price, with savings around 70% off, meaning a 3-carat-plus lab grown diamond stays realistic for buyers who assumed this size was out of reach.
  • 11 years of specialized sourcing behind every stone. GDBS has operated as a diamond and gemstone supplier for over a decade, with a 4.8 rating across 6,200-plus reviews and 24,500-plus completed sales as a track record.
  • Wholesale and custom sourcing on request. If the exact shape, color, or clarity you want isn't currently listed, our wholesale enquiry channel lets you submit specific requirements rather than settling for what's in stock.

Stones this size move fast and don't restock often. Take a look at what's currently available and reach out if you need something specific sourced.

  • Larger carat diamonds are naturally rarer to produce and source, even in lab grown form, which is why this collection holds fewer pieces than our 1 or 2 carat ranges. New stones are added as they become available, so it's worth checking back regularly or reaching out directly if you have a specific requirement.

  • Lab grown diamonds at 3 carats and above are priced substantially below natural diamonds of the same size and grade, which is part of why this weight class has become achievable for buyers who previously assumed it was out of budget. Current listings show savings of roughly 70% off the regular price, with the discount displayed directly on each product.

  • Since this collection is limited by nature, not every combination is available at all times. Our team handles custom sourcing requests through the wholesale enquiries page, so you can specify exactly what you're looking for rather than settling for what's listed.

  • It depends on the setting and your lifestyle, but stones in this range are more commonly chosen for statement engagement rings, anniversary pieces, or special-occasion jewelry rather than daily-wear bands. A low-profile setting can make a larger stone more practical if everyday wear is a priority, and that's a conversation worth having with your jeweler before finalizing a setting.

  • Each product page lists the exact carat weight, color grade, and clarity grade for that specific stone, and our team is available to answer detailed questions before checkout. Given the value of a stone in this range, we'd encourage reaching out through our contact page if you want additional detail before purchasing.

  • Purchases from this collection are covered under our standard return and exchange policy, giving you a window to return the stone if needed. Specific terms and timelines are outlined on our return and exchange page.

  • All orders include free standard shipping with packaging and handling appropriate for higher-value stones. Delivery timing and carrier specifics are listed on our shipping policy page.