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Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2231668058

Certificate GIA 2231668058

Diamond specifications and retailer prices

From £18,399 GBP
CA$34,240 CAD
As of October 30, 2026
Save £11,821 GBP (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £30,220 GBP at MOH London · As of November 1, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2231668058. Listed at 12 retailers as of October 30, 2026, with prices from £18,399 to £30,220, a £11,821 spread on the same certified stone. MOH London lists it at £30,220. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2231668058
Dimensions8.62 × 8.71 × 5.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
8.62 mm8.71 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2231668058
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.9%

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 30
Current: £30,220 GBP|Low: £18,399 GBP|High: £31,394 GBP|Avg: £22,233 GBP|-2.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 6£18,399 GBP
Retailer 3£18,514 GBP
Retailer 5£19,554 GBP
Retailer 7£19,670 GBP
Retailer 4£20,071 GBP
Retailer 12£20,156 GBP
Retailer 8£21,243 GBP
Retailer 2£22,810 GBP
Retailer 9£22,817 GBP
Retailer 11£23,021 GBP
Retailer 10£23,121 GBP
MOH London£30,220 GBP

27 data points across 12 retailers

12 retailers£18,399 GBP to £30,220 GBP

A
Cheapest Retailer
-
£18,399 GBP
CA$34,240 CAD
B+
Retailer 2
-
£18,514 GBP
$24,807 USD
View
B+
Retailer 3
-
£19,554 GBP
View
B+
Retailer 4
-
£19,670 GBP
$26,355 USD
View
B+
Retailer 5
-
£20,071 GBP
$26,893 USD
View
B+
Retailer 6
-
£20,156 GBP
$27,007 USD
View
B+
Retailer 7
-
£21,243 GBP
$28,463 USD
View
B+
Retailer 8
-
£22,810 GBP
€29,107 EUR
View
B+
Retailer 9
-
£22,817 GBP
$30,572 USD
View
B+
Retailer 10
-
£23,021 GBP
$30,846 USD
View
B
Retailer 11
-
£23,121 GBP
$30,980 USD
View
Most Expensive
B
MOH London
52CCB158F · Nov 1
£30,220 GBP
View
11 more retailers have this diamond
Prices start from £18,399 GBPSave up to £11,821 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
£18,399 GBP