1.51ct H SI2 Round Natural Diamond

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 7558636517. Listed at 18 retailers as of October 30, 2026, with prices from $3,942 to $8,172, a $4,230 spread on the same certified stone. MOH London lists it at $8,172. 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.