0.40ct D SI1 Cushion Natural Diamond

About this 0.4ct natural cushion diamond

This 0.4ct natural cushion sits in the sub-half-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2246218892. Listed at 10 retailers as of October 31, 2026, with prices from £498 to £829, a £331 spread on the same certified stone. 77 Diamonds lists it at £829. 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.