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Marquise|Natural|GIA

0.50ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 6552531486

Certificate GIA 6552531486

Diamond specifications and retailer prices

From £305 GBP
HK$3,200 HKD
As of November 1, 2026
Save £152 GBP (33%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,390 GBP at NZ Jewellers · As of October 30, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552531486. Listed at 9 retailers as of November 1, 2026, with a 50% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552531486
Dimensions8.68 × 3.99 × 2.44 mm
L/W Ratio2.18
Key to symbols
Feather
Top View
8.68 mm3.99 mm0.50 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552531486
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 61.3%

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 1
Current: £1,390 GBP|Low: £305 GBP|High: £1,429 GBP|Avg: £508 GBP|-2.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7£305 GBP
Retailer 9£335 GBP
Retailer 6£363 GBP
Retailer 8£383 GBP
Retailer 4£390 GBP
Retailer 10£402 GBP
Retailer 5£418 GBP
Retailer 2£433 GBP
Retailer 3£457 GBP
NZ Jewellers£1,390 GBP

42 data points across 10 retailers

9 retailers£305 GBP to £457 GBP

A
Cheapest Retailer
-
£305 GBP
HK$3,200 HKD
A
Retailer 2
-
£335 GBP
$449 USD
View
Final sale: no returns
A
Retailer 3
-
£363 GBP
$487 USD
View
A
Retailer 4
-
£383 GBP
SGD 694 SGD
View
A
Retailer 5
-
£390 GBP
$524 USD
View
B+
Retailer 6
-
£418 GBP
$561 USD
View
B+
Retailer 7
-
£433 GBP
View
B+
Retailer 8
-
£457 GBP
View
Most Expensive
NZ Jewellers
04a1f447-091a-4ddc-be68-6e1c471e5779 · Oct 30
£1,390 GBP
$1,865 USD
View
Price under review
8 more retailers have this diamond
Prices start from £305 GBPSave up to £152 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
£305 GBP