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Marquise|Natural|GIA

0.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 5241051030

Certificate GIA 5241051030

Diamond specifications and retailer prices

From £439 GBP
HK$4,600 HKD
As of November 1, 2026
Save £773 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,645 GBP at NZ Jewellers · As of November 3, 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 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 5241051030. Listed at 19 retailers as of November 1, 2026, with a 176% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5241051030
Dimensions8.20 × 4.20 × 2.46 mm
L/W Ratio1.95
Girdle conditionFaceted
Top View
8.20 mm4.20 mm0.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5241051030
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.6%

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: £1,645 GBP|Low: £439 GBP|High: £1,698 GBP|Avg: £694 GBP|-3.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 3, 2026
Retailer 9£439 GBP
Retailer 18£458 GBP
Retailer 15£484 GBP
Retailer 10£484 GBP
Retailer 14£519 GBP
Retailer 17£525 GBP
Retailer 8£543 GBP
Retailer 3£545 GBP
Retailer 2£583 GBP
Retailer 11£644 GBP
Retailer 7£659 GBP
Retailer 5£661 GBP
Retailer 6£688 GBP
Retailer 12£711 GBP
Retailer 4£770 GBP
Retailer 16£813 GBP
Retailer 13£1,211 GBP
NZ Jewellers£1,645 GBP

22 data points across 18 retailers

19 retailers£439 GBP to £1,211 GBP

A
Cheapest Retailer
-
£439 GBP
HK$4,600 HKD
A
Retailer 2
-
£458 GBP
$615 USD
View
A
Retailer 3
-
£484 GBP
$649 USD
View
Final sale: no returns
A
Retailer 4
-
£484 GBP
$650 USD
View
A
Retailer 5
-
£519 GBP
€664 EUR
View
A
Retailer 6
-
£525 GBP
$705 USD
View
A
Retailer 7
-
£543 GBP
SGD 985 SGD
View
Price last confirmed 7 days ago
A
Retailer 8
-
£545 GBP
$731 USD
View
B+
Retailer 9
-
£583 GBP
View
B+
Retailer 10
-
£644 GBP
View
B+
Retailer 11
-
£659 GBP
$885 USD
View
B+
Retailer 12
-
£661 GBP
$887 USD
View
B+
Retailer 13
-
£688 GBP
$923 USD
View
B+
Retailer 14
-
£711 GBP
€909 EUR
View
Retailer 15
-
£770 GBP
$1,033 USD
View
Price last confirmed 7 days ago
B+
Retailer 16
-
£813 GBP
ZAR 17,634 ZAR
View
Retailer 17
-
£825 GBP
A$1,703 AUD
View
Price last confirmed 30 days ago
B
Retailer 18
-
£1,211 GBP
View
Most Expensive
NZ Jewellers
0bce4cbb-cd49-426c-a1b5-9304e6c395b5 · Nov 3
£1,645 GBP
$2,208 USD
View
Price under review
18 more retailers have this diamond
Prices start from £439 GBPSave up to £773 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
£439 GBP