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Cushion|Natural|GIA

0.50ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 2556404837

Certificate GIA 2556404837

Diamond specifications and retailer prices

From £283 GBP
As of November 6, 2026
Save £106 GBP (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £389 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.5ct natural cushion diamond

This 0.5ct natural cushion sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556404837. Listed at 4 retailers as of November 5, 2026, with prices from £283 to £389, a £106 spread on the same certified stone. Blue Nile lists it at £389. 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

0.50
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556404837
Dimensions4.42 × 4.39 × 2.96 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal
Top View
4.42 mm4.39 mm0.50 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2556404837
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £389 GBP|Low: £253 GBP|High: £412 GBP|Avg: £330 GBP|-5.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£283 GBP
Retailer 3£294 GBP
Retailer 2£363 GBP
Blue Nile£389 GBP

42 data points across 4 retailers

4 retailers£283 GBP to £389 GBP

A
Cheapest Retailer
-
£283 GBP
A
Retailer 2
-
£294 GBP
View
Final sale: no returns
A
Retailer 3
-
£363 GBP
View
Most Expensive
A
Blue Nile
29285636 · Nov 5
£389 GBP
$521 USD
View
3 more retailers have this diamond
Prices start from £283 GBPSave up to £106 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
0.50ct Cushion
£283 GBP