0.40ct J SI1 Round Natural Diamond

About this 0.4ct natural round diamond

This 0.4ct natural round sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 2396962220. Listed at 19 retailers as of October 28, 2026, with prices from £174 to £871, a £697 spread on the same certified stone. NZ Jewellers lists it at £871. 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.