Certified 5, 6 & 7 Carat DEF Lab Grown HPHT Loose Diamonds — Reliable B2B Supply for Jewelry Manufacturers Worldwide
We are pleased to announce the launch of our dedicated B2B supply program for 5 carat, 6 carat, and 7 carat DEF lab grown HPHT loose diamonds. Designed specifically for jewelry manufacturers, wholesalers, and retail chains, this program ensures reliable, consistent access to premium large carat stones with full IGI/GIA certification and competitive trade pricing.
Built for B2B: What Sets Our Supply Program Apart
Consistency is the backbone of any successful jewelry manufacturing operation. Our B2B supply program addresses the key challenges that manufacturers face when sourcing large carat lab grown diamonds:
- Predictable Inventory: Maintained stock levels across 5ct, 6ct, and 7ct DEF color grades — no more last-minute sourcing scrambles.
- Consistent Quality: Every stone meets strict grading standards for color (D–F), clarity, and cut quality before entering our inventory.
- Flexible Order Quantities: From single stones for bespoke commissions to bulk orders for production runs — we accommodate your workflow.
- Fast Turnaround: Orders are processed within 24–48 hours with worldwide insured express shipping.
Certification & Quality Standards
Quality assurance is non-negotiable in B2B diamond supply. Every stone in our collection includes:
- Independent Grading Report: Full certification from IGI (International Gemological Institute) or GIA (Gemological Institute of America) — the two most respected diamond grading authorities worldwide.
- 4Cs Documentation: Complete documentation of carat weight, color grade, clarity grade, and cut quality for every individual stone.
- High-Resolution Imaging: Professional 360° video and macro photography available upon request for remote assessment.
- Laser Inscription Option: Optional laser inscription of certificate numbers on girdle for traceability and consumer confidence.
Technical Specifications
| Parameter | Standard Offering | Custom Available |
|---|
| Carat Weight | 5.00ct / 6.00ct / 7.00ct | Custom sizes on request |
| Color | D / E / F (Colorless) | G–J available |
| Clarity | VS1–SI1 | VVS–SI2 available |
| Cut | Excellent–Very Good | Ideal cut on request |
| Shape | Round Brilliant | Princess, Emerald, Oval, Pear, Cushion |
| Growth Method | HPHT | Type IIa classification |
| Certification | IGI or GIA | Dual certification available |
Industries We Serve
- Fine Jewelry Manufacturers: Reliable source for center stones in high-end rings, pendants, and earrings at 5–7 carat sizes — a range that is notoriously difficult to source consistently in natural diamonds.
- Private Label Brands: Build your brand's diamond collection with certified stones and full transparency documentation to share with your customers.
- Retail Chains & E-Commerce: Stock your showcases with competitively priced DEF large carat diamonds that deliver exceptional margin potential.
- Custom Design Studios: Access a consistent supply of premium loose stones for bespoke client projects without the unpredictability of the mined market.
Partnership Benefits
We believe in long-term partnership over transactional selling. Our B2B clients enjoy:
- Tiered Volume Pricing: Progressive discounts based on annual purchase volume.
- Priority Allocation: First access to new inventory arrivals before general listing.
- Dedicated Account Management: A single point of contact for all your sourcing needs.
- Flexible Payment Terms: Net 30/60/90 terms available for qualified buyers after credit approval.
- After-Sales Support: Re-cutting, re-polishing, and re-certification services if needed.
Become a trade partner today. Contact our B2B sales team to discuss your requirements, request a current inventory list, and receive competitive wholesale pricing for 5–7 carat DEF lab grown HPHT loose diamonds.
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