0.31ct D SI1 Round Lab Grown Diamond

About this 0.31ct lab-grown round diamond

This 0.31ct lab-grown round sits in the sub-half-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG704563699 or 704563699. Listed at 28 retailers as of October 26, 2026, with prices from £51 to £463, a £413 spread on the same certified stone. MOH London lists it at £463. 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.