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Round|Natural|GIA

2.51ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2557717803

Certificate GIA 2557717803

Diamond specifications and retailer prices

From £16,166 GBP
$21,660 USD
As of October 29, 2026
Save £9,529 GBP (37%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £25,694 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557717803. Listed at 7 retailers as of October 26, 2026, with prices from £16,166 to £25,694, a £9,529 spread on the same certified stone. MOH London lists it at £25,694. 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557717803
Dimensions8.64 × 8.69 × 5.38 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle
Top View
8.64 mm8.69 mm2.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557717803
Side View
Table 58.0%Crown 35.5°GirdlePavilion 40.8°CuletDepth 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: Oct 29
Current: £25,694 GBP|Low: £16,166 GBP|High: £26,623 GBP|Avg: £21,202 GBP|-2.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7£16,166 GBP
Retailer 3£18,961 GBP
Retailer 5£19,042 GBP
Retailer 6£19,646 GBP
Retailer 2£22,672 GBP
Retailer 4£23,275 GBP
MOH London£25,694 GBP

41 data points across 7 retailers

7 retailers£16,166 GBP to £25,694 GBP

A
Cheapest Retailer
-
£16,166 GBP
$21,660 USD
A
Retailer 2
-
£18,961 GBP
View
A
Retailer 3
-
£19,042 GBP
$25,514 USD
View
A
Retailer 4
-
£19,646 GBP
$26,324 USD
View
B+
Retailer 5
-
£22,672 GBP
$30,378 USD
View
B+
Retailer 6
-
£23,275 GBP
$31,186 USD
View
Most Expensive
B
MOH London
43443D64C · Oct 26
£25,694 GBP
View
6 more retailers have this diamond
Prices start from £16,166 GBPSave up to £9,529 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
£16,166 GBP