0.59ct I SI1 Marquise Natural Diamond

About this 0.59ct natural marquise diamond

This 0.59ct natural marquise sits in the half to three-quarter carat band, graded I 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 7563603220. Listed at 11 retailers as of October 31, 2026, with prices from $663 to $1,091, a $428 spread on the same certified stone. Frank Darling lists it at $1,091. 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.