Quick and Easy Buying Guide

Carat weight: 1 carat = 200 milligrams = 6.5 mm diameter. Doubling weight doesn't double diameter.

Diamond clarity: FL/IF/VVS/VS = super expensive, near perfect. SI = best value if you can check a photo for obvious inclusions (defects).


Color: D-G = colorless, expensive, only if you have money to burn. H-J = best value. Can go lower in gold metal settings than white metal.

Cut: Better cut ratings let more light into a diamond, making it sparkle more. Very important property, don't skimp here.

Set a budget and minimum cut (Premium). Go J color for gold and I/H for white metals. Go searching for SI1/SI2 clarity diamonds at James Allen. Pick a diamond with small/no inclusions. Choose a ring setting and buy it risk-free (60-day returns).

Found: a 0.40 Carat G Color VS2 Clarity Ideal Cut Round Cut Diamond

After some trawling the internet, I've been able to find this 0.40 Carat G Color VS2 Clarity Ideal Cut Round Cut Diamond.

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Shape: Round

Carat weight: 0.4

Cut: Ideal

Color: G

Clarity: VS2

Price: $760

Certificate: GIA

Depth: 62.6%

Table: 56.0%

Polish: Excellent

Symmetry: Excellent

Girdle: Medium to slightly thick


Fluorescence: None

Measurements: 4.69*4.73*2.95

Item number: 1336477

Click here to see the diamond at James Allen.

Click here to search for other diamonds at James Allen.

Several diamond sellers will provide an Ideal cut rating of diamond, and these diamonds are almost always (as is the situation here) perfect in terms of proportions and the general shape. Take note of this diamond's girdle characteristic - "Medium to slightly thick" - if you're unsure about girdles, go have a read of my short explanation of girdle thicknesses. The G color of this diamond provides value for your dollar, as it is not one of the expensive premium color grades D-F.