0.40ct G SI1 Marquise Natural Diamond

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2556248119. Listed at 24 retailers as of November 1, 2026, with prices from $423 to $1,487, a $1,063 spread on the same certified stone. MOH London lists it at $1,487. 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.