0.40ct H SI2 Round Lab Grown Diamond
VG • H/SI2 • IGI LGT-5398
Certificate IGI LGT-5398
Diamond specifications and retailer prices
About this 0.4ct lab-grown round diamond
This 0.4ct lab-grown round sits in the sub-half-carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LGT-5398 or T-5398. Listed at 2 retailers as of October 28, 2026, with prices from £376 to £501, a £126 spread on the same certified stone. Fonder Diamond lists it at £501. 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.
The 4Cs
Specifications
Caratlytics Score
How it works →2 retailers
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