0.31ct D SI1 Marquise Natural Diamond

About this 0.31ct natural marquise diamond

This 0.31ct natural marquise sits in the sub-half-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 841682303. Listed at 13 retailers as of October 29, 2026, with prices from $345 to $801, a $456 spread on the same certified stone. MOH London lists it at $801. 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.