0.51ct G SI2 Marquise Natural Diamond

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 815673453. Listed at 12 retailers as of October 30, 2026, with prices from $493 to $2,049, a $1,556 spread on the same certified stone. NZ Jewellers lists it at $2,049. 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.