Educational Diamond Guide
Comprehensive guide covering diamond 4Cs evaluation, natural vs. lab-grown screening, and treatment identification.
Understanding Diamond Parameters
A practical guide to diamond evaluation, screening, and report documentation.
Color Grading
Evaluates absence of body color in white diamonds (D to Z scale) or hue intensity in fancy colored diamonds.
Clarity Assessment
Maps internal inclusions (crystals, clouds, feathers) and surface blemishes under 10x magnification.
Cut & Symmetry
Measures table %, crown angle, pavilion depth, girdle thickness, polish, and facet alignment.
Carat Weight
Standard unit of weight metric (1 carat = 0.200 grams) measured using micro-balances.
Natural vs. Laboratory-Grown Diamonds (CVD & HPHT)
Laboratory-grown diamonds possess chemical and crystal structures virtually identical to natural diamonds. Distinguishing them requires specialized laboratory instrumentation (such as UV luminescence imaging and spectroscopic screening). IGL diamond reports state origin clearly on every issued document.
Discover the IGL Difference
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