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Marquise|Natural|GIA

2.50ct H SI2 Marquise Natural Diamond

EX • H/SI2

Diamond specifications and retailer prices

From £18,039 GBP
CA$33,621 CAD
As of November 2, 2026
Save £8,576 GBP (32%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £26,615 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded H 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. Listed at 17 retailers as of October 30, 2026, with prices from £18,039 to £26,615, a £8,576 spread on the same certified stone. NZ Jewellers lists it at £26,615. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions12.60 × 6.95 × 4.51 mm
L/W Ratio1.81
Top View
12.60 mm6.95 mm2.50 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 59.0%CrownGirdle: MediumPavilionCuletDepth 65.0%

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: £26,615 GBP|Low: £18,039 GBP|High: £26,615 GBP|Avg: £21,218 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4£18,039 GBP
Retailer 7£18,787 GBP
Retailer 3£19,727 GBP
Retailer 9£20,353 GBP
Retailer 8£20,827 GBP
Retailer 6£21,136 GBP
Retailer 2£21,615 GBP
Retailer 5£22,370 GBP
NZ Jewellers£26,615 GBP

35 data points across 9 retailers

17 retailers£18,039 GBP to £26,615 GBP

B+
Cheapest Retailer
-
£18,039 GBP
CA$33,621 CAD
B+
Retailer 2
-
£18,787 GBP
$25,211 USD
View
B+
Retailer 3
-
£19,727 GBP
$26,472 USD
View
Retailer 4
-
£20,353 GBP
$27,312 USD
View
Price last confirmed 40 days ago
Retailer 5
-
£20,353 GBP
$27,312 USD
View
Price last confirmed 25 days ago
Retailer 6
-
£20,353 GBP
$27,312 USD
View
Price last confirmed 38 days ago
B
Retailer 7
-
£20,353 GBP
$27,312 USD
View
B
Retailer 8
-
£20,827 GBP
$27,948 USD
View
Retailer 9
-
£21,136 GBP
$28,363 USD
View
Price last confirmed 41 days ago
B
Retailer 10
-
£21,136 GBP
$28,363 USD
View
Retailer 11
-
£21,136 GBP
$28,363 USD
View
Price last confirmed 31 days ago
Retailer 12
-
£21,136 GBP
$28,363 USD
View
Price last confirmed 39 days ago
B
Retailer 13
-
£21,615 GBP
View
B
Retailer 14
-
£22,370 GBP
$30,019 USD
View
Retailer 15
-
£26,615 GBP
$35,716 USD
View
Price last confirmed 30 days ago
Retailer 16
-
£26,615 GBP
$35,716 USD
View
Price last confirmed 38 days ago
Most Expensive
B
NZ Jewellers
337b0396-5aa4-4869-b84f-6c16b741e81e · Oct 30
£26,615 GBP
$35,716 USD
View
16 more retailers have this diamond
Prices start from £18,039 GBPSave up to £8,576 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
£18,039 GBP