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Marquise|Natural|GIA

0.50ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 5566263559

Certificate GIA 5566263559

Diamond specifications and retailer prices

From £266 GBP
₹33,997 INR
As of November 1, 2026
Save £550 GBP (67%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,347 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 5566263559. Listed at 17 retailers as of October 29, 2026, with a 207% 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 5566263559
Dimensions7.76 × 4.07 × 2.59 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Twinning Wisp, Feather
Top View
7.76 mm4.07 mm0.50 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5566263559
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.7%

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: £420 GBP|Low: £266 GBP|High: £816 GBP|Avg: £411 GBP|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5£266 GBP
Retailer 9£298 GBP
Retailer 2£324 GBP
Retailer 4£324 GBP
Retailer 1£420 GBP
Retailer 6£425 GBP
Retailer 3£438 GBP
Retailer 8£458 GBP
Retailer 7£530 GBP
Retailer 10£816 GBP

15 data points across 10 retailers

17 retailers£266 GBP to £816 GBP

A
Cheapest Retailer
-
£266 GBP
₹33,997 INR
A
Retailer 2
-
£298 GBP
$400 USD
View
A
Retailer 3
-
£324 GBP
$435 USD
View
B+
Retailer 4
-
£324 GBP
$435 USD
View
Final sale: no returns
A
Retailer 5
-
£352 GBP
$472 USD
View
A
Retailer 6
-
£359 GBP
$482 USD
View
A
Retailer 7
-
£379 GBP
$508 USD
View
A
Retailer 8
-
£379 GBP
$508 USD
View
B+
Retailer 9
-
£405 GBP
$544 USD
View
B+
Retailer 10
-
£420 GBP
View
B+
Retailer 11
-
£425 GBP
$570 USD
View
B+
Retailer 12
-
£438 GBP
View
B+
Retailer 13
-
£449 GBP
$603 USD
View
B+
Retailer 14
-
£458 GBP
$614 USD
View
B+
Retailer 15
-
£530 GBP
€677 EUR
View
B
Retailer 16
-
£816 GBP
View
Most Expensive
NZ Jewellers
924eb302-67a8-4ca8-b6fe-a3b5d9c13a14 · Oct 30
£1,347 GBP
$1,808 USD
View
Price under review
16 more retailers have this diamond
Prices start from £266 GBPSave up to £550 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
£266 GBP