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Cushion|Natural|AGS

0.51ct G SI1 Cushion Natural Diamond

GD • G/SI1 • AGS 104090383005

Certificate AGS 104090383005

Diamond specifications and retailer prices

From £657 GBP
As of November 6, 2026
Save £22 GBP (3%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £680 GBP at Jared · As of November 6, 2026
View at Jared

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by AGS 104090383005. Listed at 3 retailers as of November 6, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

0.51
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishIdeal
SymmetryIdeal
Fluorescence
OriginNatural
Grading LabAGS
CertificateAGS 104090383005
Dimensions4.38 × 4.33 mm
L/W Ratio1.01
Top View
4.38 mm4.33 mm0.51 ctG / SI1
OriginNatural
CutGood
PolishIdeal
SymmetryIdeal
CertificateAGS 104090383005
Side View
Table 61.1%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 75.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £680 GBP|Low: £657 GBP|High: £755 GBP|Avg: £700 GBP|-9.9%
Jared
Retailer 2
Retailer 3
June 25, 2026
Retailer 2£657 GBP
Retailer 3£657 GBP
Jared£680 GBP

8 data points across 3 retailers

3 retailers£657 GBP to £680 GBP

B
Cheapest Retailer
-
£657 GBP
B
Retailer 2
-
£657 GBP
View
Most Expensive
B
Jared
147907035 · Nov 6
£680 GBP
$910 USD
View
2 more retailers have this diamond
Prices start from £657 GBPSave up to £22 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
0.51ct Cushion
£657 GBP