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Cushion|Natural|GIA

0.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 1545558858

Certificate GIA 1545558858

Diamond specifications and retailer prices

From £381 GBP
As of November 6, 2026
Save £36 GBP (9%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £417 GBP at Fonder Diamond · As of November 5, 2026
View at Fonder Diamond

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1545558858. Listed at 2 retailers as of November 5, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle41.1°
OriginNatural
Grading LabGIA
CertificateGIA 1545558858
Dimensions4.68 × 4.66 × 3.12 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
4.68 mm4.66 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1545558858
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 41.1°Culet: NoneDepth 66.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £417 GBP|Low: £335 GBP|High: £665 GBP|Avg: £475 GBP|+0.3%
Fonder Diamond
Retailer 2
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November 5, 2026
Retailer 5£335 GBP
Retailer 18£336 GBP
Retailer 6£381 GBP
Retailer 13£383 GBP
Retailer 14£401 GBP
Fonder Diamond£417 GBP
Retailer 19£439 GBP
Retailer 17£443 GBP
Retailer 8£463 GBP
Retailer 9£463 GBP
Retailer 7£478 GBP
Retailer 16£489 GBP
Retailer 2£502 GBP
Retailer 15£514 GBP
Retailer 3£545 GBP
Retailer 11£581 GBP
Retailer 10£592 GBP
Retailer 12£597 GBP
Retailer 4£665 GBP

6 data points across 19 retailers

2 retailers£381 GBP to £417 GBP

A
Cheapest Retailer
-
£381 GBP
Most Expensive
B+
Fonder Diamond
636701768 · Nov 5
£417 GBP
SGD 754 SGD
View
1 more retailer has this diamond
Prices start from £381 GBPSave up to £36 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.

A
0.51ct Cushion
£381 GBP