0.42ct H SI1 Marquise Natural Diamond

About this 0.42ct natural marquise diamond

This 0.42ct natural marquise sits in the sub-half-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541662542. Listed at 9 retailers as of November 2, 2026, with prices from $318 to $1,011, a $693 spread on the same certified stone. MOH London lists it at $1,011. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.