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2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 563222188

Shape and cutting style on the report: Round brilliant

Certificate IGI 563222188

Diamond specifications and retailer prices

From £4,618 GBP
As of November 1, 2026
Save £2,800 GBP (38%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £7,418 GBP at MOH London · As of November 2, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 563222188. Listed at 5 retailers as of November 1, 2026, with prices from £4,618 to £7,418, a £2,800 spread on the same certified stone. MOH London lists it at £7,418. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 563222188
Dimensions8.96 × 8.87 × 5.20 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
Faint Brown
Top View
8.96 mm8.87 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 563222188
Side View
Table 59.5%Crown 33.9°Girdle: THN-MEDPavilion 40.3°Culet: NoneDepth 58.4%

Caratlytics Score

How it works →
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: £7,418 GBP|Low: £4,618 GBP|High: £7,507 GBP|Avg: £5,525 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 4£4,618 GBP
Retailer 5£4,650 GBP
Retailer 2£5,121 GBP
Retailer 3£5,792 GBP
MOH London£7,418 GBP

33 data points across 5 retailers

5 retailers£4,618 GBP to £7,418 GBP

A
Cheapest Retailer
-
£4,618 GBP
A
Retailer 2
-
£4,650 GBP
View
A
Retailer 3
-
£5,121 GBP
View
A
Retailer 4
-
£5,792 GBP
View
Most Expensive
A
MOH London
CD1839238 · Nov 2
£7,418 GBP
View
4 more retailers have this diamond
Prices start from £4,618 GBPSave up to £2,800 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
£4,618 GBP