0.40ct G SI1 Round Lab Grown Diamond

About this 0.4ct lab-grown round diamond

This 0.4ct lab-grown round sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG694537251 or 694537251. Listed at 4 retailers as of October 28, 2026, with prices from $338 to $573, a $234 spread on the same certified stone. MOH London lists it at $573. 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.