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Round|Natural|GIA

2.51ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 6535246891

Certificate GIA 6535246891

Diamond specifications and retailer prices

From £16,761 GBP
$22,458 USD
As of November 1, 2026
Save £11,776 GBP (41%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £28,538 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6535246891. Listed at 22 retailers as of October 26, 2026, with prices from £16,761 to £28,538, a £11,776 spread on the same certified stone. MOH London lists it at £28,538. 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

2.51
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6535246891
Dimensions8.94 × 8.83 × 5.34 mm
L/W Ratio1.01
Top View
8.94 mm8.83 mm2.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6535246891
Side View
Table 55.0%Crown 32°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 60.1%

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: £28,538 GBP|Low: £15,883 GBP|High: £28,843 GBP|Avg: £19,774 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 3£15,883 GBP
Retailer 6£16,068 GBP
Retailer 11£16,776 GBP
Retailer 10£17,772 GBP
Retailer 9£18,799 GBP
Retailer 2£19,853 GBP
Retailer 8£21,002 GBP
Retailer 5£21,061 GBP
Retailer 4£21,289 GBP
Retailer 7£21,971 GBP
MOH London£28,538 GBP

40 data points across 11 retailers

22 retailers£16,761 GBP to £28,538 GBP

Retailer 1
-
£16,068 GBP
$21,530 USD
Price last confirmed 8 days ago
A
Retailer 2
-
£16,761 GBP
$22,458 USD
View
A
Retailer 3
-
£16,776 GBP
$22,478 USD
View
A
Retailer 4
-
£16,919 GBP
$22,670 USD
View
A
Retailer 5
-
£17,173 GBP
CA$31,958 CAD
View
B+
Retailer 6
-
£17,772 GBP
$23,812 USD
View
Final sale: no returns
Retailer 7
-
£18,249 GBP
$24,451 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£18,799 GBP
$25,188 USD
View
B+
Retailer 9
-
£19,457 GBP
$26,070 USD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
£19,457 GBP
$26,070 USD
View
Retailer 11
-
£19,505 GBP
$26,134 USD
View
Price last confirmed 7 days ago
Retailer 12
-
£19,769 GBP
$26,488 USD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£19,853 GBP
View
Retailer 14
-
£20,106 GBP
$26,940 USD
View
Price last confirmed 7 days ago
B+
Retailer 15
-
£20,529 GBP
$27,507 USD
View
B+
Retailer 16
-
£21,002 GBP
$28,140 USD
View
B+
Retailer 17
-
£21,061 GBP
View
B+
Retailer 18
-
£21,289 GBP
€27,167 EUR
View
B+
Retailer 19
-
£21,296 GBP
$28,534 USD
View
B
Retailer 20
-
£21,971 GBP
$29,439 USD
View
B
Retailer 21
-
£25,852 GBP
$34,639 USD
View
Most Expensive
B
MOH London
97D4BD44F · Oct 26
£28,538 GBP
View
21 more retailers have this diamond
Prices start from £16,761 GBPSave up to £11,776 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
2.51ct Round
£16,761 GBP