Developed by the Gemological Institute of America (GIA) , the 4Cs are the universal standard for assessing diamond quality.
Carat refers to the physical weight of the diamond (1 carat = 200mg). Because price increases exponentially at certain "magic sizes" like 1.0ct, choosing a stone slightly below these thresholds (e.g., 0.95ct) can save significant money without a visible difference in size. Beyond the 4Cs: Advanced Quality Factors what to look for when buying an engagement ring diamond
This measures the presence of inclusions (internal) or blemishes (external). For the best value, look for "eye-clean" diamonds in the VS1 to SI1 range, where imperfections are typically invisible without magnification. Developed by the Gemological Institute of America (GIA)
