Certified Loose Diamonds

The Complete Loose Diamond Supply

JNK DIAM is a direct manufacturer and supplier of certified loose diamonds. Every stone we sell is independently graded by one of the world's three leading gemological laboratories: GIA, IGI, or HRD Antwerp.

Our Diamond Inventory

Shapes Available

We supply diamonds in every popular shape:

• Round Brilliant — the most popular and optically efficient cut
• Oval — elongated elegance with exceptional brilliance
• Cushion — vintage charm with modern fire
• Emerald — step-cut sophistication and clarity showcase
• Pear — unique teardrop silhouette
• Princess — sharp, modern square brilliance
• Marquise — maximized carat appearance
• Radiant, Asscher, Heart — and other specialty cuts on request

Colour Range

From the most prized D colour (colourless) through the warmer tones of J and beyond. We also supply Fancy Yellow, Fancy Brown, and rare Fancy Colour diamonds (pink, blue, green) for premium collections.

Clarity Grades

• FL/IF — Flawless and Internally Flawless for investment-grade stones
• VVS1/VVS2 — Very Very Slightly Included, excellent for high-end retail
• VS1/VS2 — Very Slightly Included, the sweet spot for value and beauty
• SI1 — Slightly Included, ideal for commercial jewellery

Carat Weights

From precision melee (0.01 ct) for pavé settings to significant single stones (5.00+ ct) for investment and bespoke pieces.

Why Certified Matters

A diamond without a certificate is just a shiny stone. Certification from GIA, IGI, or HRD provides:

• Independent verification of the 4Cs
• Laser inscription for identification and security
• Global trade acceptance — certified stones are liquid assets
• Consumer confidence — essential for retail and D2C sales

Supply Models

• Single Stones — hand-selected to your exact specifications
• Matched Pairs — for earrings and symmetrical designs
• Calibrated Parcels — consistent size, colour, and clarity for production runs
• Mixed Lots — cost-effective assortments for volume retailers