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Marquise|Natural|GIA

0.50ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6555438330

Certificate GIA 6555438330

Diamond specifications and retailer prices

From £267 GBP
As of November 4, 2026
Save £941 GBP (78%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,208 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.5ct natural marquise diamond

This 0.5ct natural marquise sits in the half to three-quarter carat band, graded J 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 6555438330. Listed at 11 retailers as of November 4, 2026, with prices from £267 to £1,208, a £941 spread on the same certified stone. NZ Jewellers lists it at £1,208. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6555438330
Dimensions8.44 × 4.16 × 2.41 mm
L/W Ratio2.03
Girdle conditionThick to Very Thick
Key to symbols
Feather, Crystal
Top View
8.44 mm4.16 mm0.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555438330
Side View
Table 65.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 57.9%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: £1,208 GBP|Low: £267 GBP|High: £1,230 GBP|Avg: £519 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11£267 GBP
Retailer 2£283 GBP
Retailer 10£325 GBP
Retailer 8£386 GBP
Retailer 9£409 GBP
Retailer 3£413 GBP
Retailer 7£415 GBP
Retailer 4£470 GBP
Retailer 5£625 GBP
Retailer 6£888 GBP
NZ Jewellers£1,208 GBP

28 data points across 11 retailers

11 retailers£267 GBP to £1,208 GBP

A
Cheapest Retailer
-
£267 GBP
Final sale: no returns
A
Retailer 2
-
£283 GBP
View
A
Retailer 3
-
£325 GBP
View
A
Retailer 4
-
£386 GBP
View
A
Retailer 5
-
£409 GBP
View
Retailer 6
-
£413 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
£415 GBP
View
B+
Retailer 8
-
£470 GBP
View
B+
Retailer 9
-
£625 GBP
View
B
Retailer 10
-
£888 GBP
View
Most Expensive
B
NZ Jewellers
62cd1bc3-5fc8-42e9-84af-cd8d77ad2090 · Nov 5
£1,208 GBP
$1,617 USD
View
10 more retailers have this diamond
Prices start from £267 GBPSave up to £941 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 Marquise
£267 GBP