0.42ct J SI1 Marquise Natural Diamond

About this 0.42ct natural marquise diamond

This 0.42ct natural marquise sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 3565335187. Listed at 3 retailers as of November 1, 2026, with prices from $305 to $418, a $113 spread on the same certified stone. 77 Diamonds lists it at $418. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.