Concierge Service: Best ~0.40 Ct Round Natural Diamond Under EUR600

Cut: Round Brilliant
Carat: from 0.37 to 0.41
Color Range: Near Colorless (G-H-I-J)
Clarity: VS1-VS2
Message: The diamond size range is between 0.37 to 0.41. The ring would be in yellow gold while the crown in white. My price range is very limited… 600 eur. :/ what are the options? I think I will pair it with 4 or six claw classic setting from Blue Nile. 
DiamondPriceVendorMy Overall Score

0.30 ct J VS2 Expert Selection Round Cut Loose Diamond
excl VAT

0.317 ct J VS2 A CUT ABOVE® Hearts and Arrows Diamond
excl VAT

0,37-Carat Round Cut Diamond
Ideal Cut | J Color | VS2 Clarity
inc VAT

0,38-Carat Round Cut Diamond
Ideal Cut | K Color | VS2 Clarity
inc VAT

0,37 Carat Round Cut Diamond
J Color VS2 Clarity
Excl VAT


I generally recommend 6 prong settings as there are less reports of 6 prong settings being returned in favor of 4 prong settings than visa-versa. Blue Nile has it in 18k gold, whereas James Allen also has a 14k gold version available both of which I link to below. Platinum is available at both merchants if you prefer. I’d stay away from what is called “white gold” as that has to be re-plated with rhodium every couple of years to keep looking the way it’s meant to.

14K Yellow Gold Tapered Six Prong Diamond Engagement Ring €553 Exc VAT from James Allen



Prices may vary depending on exchange rate.

My Overall Score is a measure combining a number of factors including:

  • the AGS cut guidelines potential cut grade; What is AGS? See this article; The AGS cut grade takes into consideration fire, brilliance, contrast and light performance.
  • how confident I am that the recipient will absolutely love love love the diamond;
  • good contrast
  • optical precision
  • the value I believe it represents;
  • must be deemed eye-clean by me;
  • how well it fits the brief.

Thomas J Stevens GIA DG CSG