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2.51ct L SI1 Round Natural Diamond

EX • L/SI1 • IGI 573303601

Shape and cutting style on the report: Round brilliant

Certificate IGI 573303601

Diamond specifications and retailer prices

From £5,056 GBP
As of November 4, 2026
Save £4,728 GBP (48%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £9,784 GBP at NZ Jewellers · As of November 5, 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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 573303601. Listed at 12 retailers as of November 4, 2026, with prices from £5,056 to £9,784, a £4,728 spread on the same certified stone. NZ Jewellers lists it at £9,784. 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
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 573303601
Dimensions8.70 × 8.74 × 5.42 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
8.70 mm8.74 mm2.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 573303601
Side View
Table 57.0%Crown 35.1°Girdle: THN-MEDPavilion 41.4°Culet: NoneDepth 62.2%

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 4
Current: £9,784 GBP|Low: £5,040 GBP|High: £10,594 GBP|Avg: £6,447 GBP|-7.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 12£5,056 GBP
Retailer 8£5,088 GBP
Retailer 3£5,394 GBP
Retailer 9£5,400 GBP
Retailer 2£5,598 GBP
Retailer 11£5,850 GBP
Retailer 10£5,939 GBP
Retailer 4£5,971 GBP
Retailer 6£6,370 GBP
Retailer 5£6,717 GBP
Retailer 7£6,749 GBP
NZ Jewellers£9,784 GBP

34 data points across 12 retailers

12 retailers£5,056 GBP to £9,784 GBP

A
Cheapest Retailer
-
£5,056 GBP
A
Retailer 2
-
£5,088 GBP
View
A
Retailer 3
-
£5,394 GBP
View
Retailer 4
-
£5,400 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£5,598 GBP
View
A
Retailer 6
-
£5,850 GBP
View
A
Retailer 7
-
£5,939 GBP
View
A
Retailer 8
-
£5,971 GBP
View
B+
Retailer 9
-
£6,370 GBP
View
B+
Retailer 10
-
£6,717 GBP
View
B+
Retailer 11
-
£6,749 GBP
View
Most Expensive
B
NZ Jewellers
73a18abf-e15a-41e8-be7c-880a184cc0f2 · Nov 5
£9,784 GBP
$13,168 USD
View
11 more retailers have this diamond
Prices start from £5,056 GBPSave up to £4,728 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
£5,056 GBP