Marquise|Natural|GIA

0.50ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 3545601791

Certificate GIA 3545601791

Diamond specifications and retailer prices

From £434 GBP
$583 USD
As of November 2, 2026
Save £766 GBP (64%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,629 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 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 3545601791. Listed at 17 retailers as of November 2, 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545601791
Dimensions7.82 × 4.05 × 2.39 mm
L/W Ratio1.93
Top View
7.82 mm4.05 mm0.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3545601791
Side View
Table 55.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 59.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £1,629 GBP|Low: £362 GBP|High: £1,629 GBP|Avg: £854 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 8£434 GBP
Retailer 10£507 GBP
Retailer 3£577 GBP
Retailer 5£611 GBP
Retailer 2£642 GBP
Retailer 6£739 GBP
Retailer 9£781 GBP
Retailer 7£802 GBP
Retailer 4£1,200 GBP
Retailer 11£1,494 GBP
NZ Jewellers£1,629 GBP

45 data points across 11 retailers

17 retailers£434 GBP to £1,200 GBP

B+
Cheapest Retailer
-
£434 GBP
$583 USD
Final sale: no returns
B+
Retailer 2
-
£471 GBP
$632 USD
View
B+
Retailer 3
-
£484 GBP
$650 USD
View
B+
Retailer 4
-
£490 GBP
$657 USD
View
B+
Retailer 5
-
£507 GBP
$680 USD
View
B+
Retailer 6
-
£507 GBP
$680 USD
View
B
Retailer 7
-
£543 GBP
$729 USD
View
B
Retailer 8
-
£577 GBP
$774 USD
View
B
Retailer 9
-
£611 GBP
$820 USD
View
B
Retailer 10
-
£642 GBP
View
B
Retailer 11
-
£739 GBP
€944 EUR
View
B
Retailer 12
-
£740 GBP
$993 USD
View
Retailer 13
-
£781 GBP
A$1,613 AUD
View
Price last confirmed 30 days ago
B
Retailer 14
-
£802 GBP
ZAR 17,384 ZAR
View
B
Retailer 15
-
£1,200 GBP
View
Retailer 16
-
£1,494 GBP
CA$2,785 CAD
View
Price under review
Most Expensive
NZ Jewellers
902963e8-edb8-4d90-b627-dfc4491a045a · Nov 3
£1,629 GBP
$2,186 USD
View
Price under review
16 more retailers have this diamond
Prices start from £434 GBPSave up to £766 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.

B+
0.50ct Marquise
£434 GBP