0.31ct F SI2 Marquise Natural Diamond

About this 0.31ct natural marquise diamond

This 0.31ct natural marquise sits in the sub-half-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6531316208. Listed at 20 retailers as of November 1, 2026, with prices from $288 to $665, a $377 spread on the same certified stone. MOH London lists it at $665. 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.