Diamond Testing & Analysis
Scientific screening, physical optical characterization, 4Cs assessment, and natural vs. laboratory-grown diamond verification.
Scientific Diamond Testing
Diamond testing at IGL combines optical examination, microscopic clarity assessment, color comparison, and advanced screening techniques to differentiate natural diamonds from lab-grown (HPHT/CVD) alternatives and diamond simulants.
Our analysts examine diamond proportions, symmetry, fluorescence reaction, and internal inclusion characteristics to produce standardized, objective laboratory reports.
Core Diamond Testing Scope
- Natural vs. Lab-Grown Screening (CVD/HPHT)
- Color Grade Evaluation (Master Stone Comparison)
- Microscopic Clarity Plotting & Assessment
- Proportion & Symmetry Analysis
- UV Fluorescence Behavior Observation
Diamond Parameter Evaluation
How IGL evaluates the fundamental physical characteristics of diamonds.
Color Assessment
Evaluated under daylight-equivalent D65 lighting using calibrated master color comparison sets.
Clarity Examination
10x darkfield binocular microscopic examination to map internal inclusions and surface blemishes.
Cut & Symmetry
Optical measurement of table percentage, crown angle, pavilion depth, girdle thickness, and culet.
Carat Weight
Precision electronic micro-balance weighing accurate to 1/1000th of a carat.
Discover the IGL Difference
Professional Testing · Trusted Certification · A Brighter Tomorrow