1ct HPHT Lab Created Diamond 0.9-3mm Melee Diamonds Cut D VS1/FG VS-SI White Loose Lab Grown Diamonds for Jewelry Making

Crystal Growth Methods: Tier-1 HPHT (High-Pressure High-Temperature) and advanced CVD (Chemical Vapor Deposition).

Complete Size Range (Diameter in mm): 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0mm.

Strict Sizing Tolerance: Calibrated to an industry-leading ±0.03mm to ±0.05mm variance.

Weight Equivalence: Ranging from 0.003 carats (for 0.8mm) to approximately 0.10 carats (for 3.0mm).

Color Grading Spectrum: Premium DEF (Colorless – Icy White) and Commercial GH (Near Colorless – Warm White).

Clarity Grading Spectrum: VVS1-VVS2 (Microscope Clean), VS1-VS2 (Eye Clean), and SI1-SI2 (Commercial Grade).

Cut Proportions: 57/58 Facet Full Cut Round Brilliant (No single cuts). Excellent to Very Good polish and symmetry.

Fluorescence: None to Faint (Strictly controlled to avoid milky appearance under UV light).

Hardness: 10 on the Mohs Scale (Identical to mined diamonds).

Part 3: The Science of Precision Cut & Its Impact on Manufacturing
The journey of our diamonds from rough to refined is a masterclass in modern gemological engineering. Unlike lower-tier suppliers who offer 17-facet « single cuts » in sizes under 1.5mm, we insist on the 57/58-facet « Full Cut » for every single stone down to 0.8mm.

Light Performance Engineering: By applying the full mathematical proportions of a standard round brilliant to a microscopic scale, we maximize the total internal reflection. This ensures that when hundreds of these stones are pave-set, they create a continuous sheet of blinding scintillation, rather than dull, flat spots.

Symmetry for Automated Setting: In modern European and American factories, automated CNC stone-setting machines are increasingly common. These machines require absolute uniformity. Our diamonds feature highly consistent girdle thicknesses and centered culets. This architectural uniformity means the automated pushers apply even pressure, virtually eliminating the risk of crushing the stone during the setting process.

Manual Bench Jeweler Efficiency: For artisans performing micro-pave work under a microscope, time is money. Inconsistently sized stones require the setter to constantly adjust their burrs and re-drill seats. Our ±0.03mm calibration means the jeweler drills one consistent seat size for the entire batch, increasing setting speed by up to 30% and reducing labor costs significantly.

Part 4: The B2B Supply Chain & Rigorous Quality Control Protocol
We do not just sell parcels; we engineer a reliable supply chain. Our quality control protocol operates on a microscopic level:

Phase 1: Automated Optical Sorting. After cutting, millions of stones pass through proprietary optical sorting machines. Utilizing high-speed cameras and spectroscopic sensors, stones are instantly separated by minute color undertones. This eradicates the « BGM » (Brown, Green, Milky) tints that plague inferior lab-grown parcels.

Phase 2: High-Precision Swiss Sieving. We utilize multi-layered, laser-drilled Swiss sorting plates. A parcel labeled « 1.5mm » has been sieved so rigorously that stones measuring 1.44mm or 1.56mm have been filtered out.

Phase 3: Deep Boiling and Cleaning. All stones undergo a rigorous deep-boiling chemical process to remove any residual polishing compounds or oils, ensuring they arrive at your facility chemically pure and ready for immediate casting-in-place (wax casting).

Phase 4: Expert Human Auditing. Finally, our senior gemologists sample every parcel under 20x magnification to verify the VVS/VS clarity promises. This multi-layered approach ensures a defect rate of near absolute zero.