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Round|Natural|IGI

2.51ct M SI2 Round Natural Diamond

EX • M/SI2 • IGI 743512805

Shape and cutting style on the report: Round brilliant

Certificate IGI 743512805

Diamond specifications and retailer prices

From £1,519 GBP
As of November 1, 2026
Save £2,486 GBP (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,005 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 743512805. Listed at 11 retailers as of October 30, 2026, with prices from £1,519 to £4,005, a £2,486 spread on the same certified stone. NZ Jewellers lists it at £4,005. 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 743512805
Dimensions8.54 × 8.60 × 5.44 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
8.54 mm8.60 mm2.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 743512805
Side View
Table 57.0%Crown 36.3°Girdle: Slightly ThickPavilion 40.9°Culet: NoneDepth 63.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £4,005 GBP|Low: £1,515 GBP|High: £4,005 GBP|Avg: £2,156 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2£1,519 GBP
Retailer 9£1,716 GBP
Retailer 8£1,831 GBP
Retailer 4£1,915 GBP
Retailer 7£1,915 GBP
Retailer 6£2,004 GBP
Retailer 10£2,019 GBP
Retailer 3£2,103 GBP
Retailer 5£2,210 GBP
NZ Jewellers£4,005 GBP

39 data points across 10 retailers

11 retailers£1,519 GBP to £4,005 GBP

A
Cheapest Retailer
-
£1,519 GBP
A
Retailer 2
-
£1,716 GBP
View
Retailer 3
-
£1,805 GBP
View
Price last confirmed 95 days ago
A
Retailer 4
-
£1,831 GBP
View
Retailer 5
-
£1,915 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
£1,915 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£2,004 GBP
View
Price last confirmed 8 days ago
Retailer 8
-
£2,019 GBP
View
Price last confirmed 7 days ago
Retailer 9
-
£2,103 GBP
View
Price last confirmed 7 days ago
B+
Retailer 10
-
£2,210 GBP
View
Most Expensive
B+
NZ Jewellers
d5a24acb-c285-4990-b854-2bdc79cccdca · Oct 30
£4,005 GBP
$5,390 USD
View
10 more retailers have this diamond
Prices start from £1,519 GBPSave up to £2,486 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
£1,519 GBP