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Marquise|Natural|GIA

2.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 1555451099

Certificate GIA 1555451099

Diamond specifications and retailer prices

From £21,145 GBP
$28,375 USD
As of November 1, 2026
Save £16,693 GBP (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £37,838 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three 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 1555451099. Listed at 16 retailers as of November 1, 2026, with prices from £21,145 to £37,838, a £16,693 spread on the same certified stone. MOH London lists it at £37,838. 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

2.50
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555451099
Dimensions13.38 × 7.02 × 4.35 mm
L/W Ratio1.91
Culet sizeNone
Top View
13.38 mm7.02 mm2.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555451099
Side View
Table 61.0%Crown 39.7°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 61.9%

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 1
Current: £37,838 GBP|Low: £21,048 GBP|High: £37,838 GBP|Avg: £25,375 GBP|+3.0%
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
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 8£21,306 GBP
Retailer 16£21,928 GBP
Retailer 4£22,058 GBP
Retailer 7£23,244 GBP
Retailer 6£23,438 GBP
Retailer 14£23,533 GBP
Retailer 11£24,401 GBP
Retailer 3£25,237 GBP
Retailer 2£25,439 GBP
Retailer 9£25,952 GBP
Retailer 5£26,205 GBP
Retailer 12£26,246 GBP
Retailer 15£27,256 GBP
Retailer 10£28,405 GBP
Retailer 13£33,501 GBP
MOH London£37,838 GBP

17 data points across 16 retailers

16 retailers£21,145 GBP to £37,838 GBP

B+
Cheapest Retailer
-
£21,145 GBP
$28,375 USD
B+
Retailer 2
-
£21,928 GBP
$29,426 USD
View
B+
Retailer 3
-
£22,058 GBP
$29,600 USD
View
Retailer 4
-
£23,244 GBP
$31,192 USD
View
Price last confirmed 17 days ago
Retailer 5
-
£23,438 GBP
$31,452 USD
View
Price last confirmed 13 days ago
B+
Retailer 6
-
£23,533 GBP
$31,580 USD
View
B+
Retailer 7
-
£24,401 GBP
View
B+
Retailer 8
-
£25,237 GBP
$33,866 USD
View
B
Retailer 9
-
£25,439 GBP
$34,137 USD
View
B
Retailer 10
-
£25,952 GBP
View
B
Retailer 11
-
£26,205 GBP
$35,165 USD
View
B
Retailer 12
-
£26,246 GBP
$35,221 USD
View
B+
Retailer 13
-
£27,256 GBP
$36,576 USD
View
B+
Retailer 14
-
£28,405 GBP
€36,303 EUR
View
B
Retailer 15
-
£33,501 GBP
ZAR 726,278 ZAR
View
Most Expensive
B
MOH London
DD5D6BCC9 · Nov 1
£37,838 GBP
View
15 more retailers have this diamond
Prices start from £21,145 GBPSave up to £16,693 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+
2.50ct Marquise
£21,145 GBP