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Marquise|Natural|GIA

0.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 2566118494

Certificate GIA 2566118494

Diamond specifications and retailer prices

From £412 GBP
As of November 6, 2026
Save £1,133 GBP (73%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,833 GBP at MOH London · As of November 2, 2026
View at MOH London

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 2566118494. Listed at 13 retailers as of November 5, 2026, with a 275% 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 2566118494
Dimensions8.24 × 4.07 × 2.52 mm
L/W Ratio2.02
Culet sizeNone
Top View
8.24 mm4.07 mm0.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2566118494
Side View
Table 60.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 62.0%

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 6
Current: £1,833 GBP|Low: £412 GBP|High: £1,833 GBP|Avg: £789 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 2£412 GBP
Retailer 5£516 GBP
Retailer 6£722 GBP
Retailer 8£765 GBP
Retailer 3£923 GBP
Retailer 11£1,000 GBP
Retailer 13£1,040 GBP
Retailer 12£1,083 GBP
Retailer 4£1,154 GBP
Retailer 9£1,228 GBP
Retailer 10£1,251 GBP
Retailer 7£1,544 GBP
MOH London£1,833 GBP

42 data points across 13 retailers

13 retailers£412 GBP to £1,544 GBP

A
Cheapest Retailer
-
£412 GBP
Retailer 2
-
£516 GBP
View
Price last confirmed 9 days ago
B+
Retailer 3
-
£722 GBP
View
B+
Retailer 4
-
£765 GBP
View
B
Retailer 5
-
£923 GBP
View
Final sale: no returns
B
Retailer 6
-
£1,000 GBP
View
B
Retailer 7
-
£1,040 GBP
View
B
Retailer 8
-
£1,083 GBP
View
B
Retailer 9
-
£1,154 GBP
View
B
Retailer 10
-
£1,228 GBP
View
B
Retailer 11
-
£1,251 GBP
View
C
Retailer 12
-
£1,544 GBP
View
Most Expensive
MOH London
369E450DD · Nov 2
£1,833 GBP
View
Price under review
12 more retailers have this diamond
Prices start from £412 GBPSave up to £1,133 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
£412 GBP