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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2556787346

Certificate GIA 2556787346

Diamond specifications and retailer prices

From £8,478 GBP
As of November 4, 2026
Save £6,538 GBP (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £15,016 GBP at MOH London · As of November 4, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556787346. Listed at 10 retailers as of November 4, 2026, with prices from £8,478 to £15,016, a £6,538 spread on the same certified stone. MOH London lists it at £15,016. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556787346
Dimensions8.60 × 5.41 × 5.41 mm
L/W Ratio1.59
Culet sizeNone
Top View
8.60 mm5.41 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556787346
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 40.6°Culet: NoneDepth 62.6%

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 4
Current: £15,016 GBP|Low: £8,097 GBP|High: £15,238 GBP|Avg: £10,267 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3£8,097 GBP
Retailer 5£8,478 GBP
Retailer 11£8,712 GBP
Retailer 9£8,946 GBP
Retailer 8£9,641 GBP
Retailer 2£10,117 GBP
Retailer 7£10,328 GBP
Retailer 10£10,444 GBP
Retailer 6£11,530 GBP
Retailer 4£11,593 GBP
MOH London£15,016 GBP

33 data points across 11 retailers

10 retailers£8,478 GBP to £15,016 GBP

A
Cheapest Retailer
-
£8,478 GBP
A
Retailer 2
-
£8,946 GBP
View
Retailer 3
-
£9,641 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£10,033 GBP
View
B+
Retailer 5
-
£10,117 GBP
View
B+
Retailer 6
-
£10,328 GBP
View
B+
Retailer 7
-
£10,444 GBP
View
B+
Retailer 8
-
£11,530 GBP
View
B+
Retailer 9
-
£11,593 GBP
View
Most Expensive
B
MOH London
44FDDC741 · Nov 4
£15,016 GBP
View
9 more retailers have this diamond
Prices start from £8,478 GBPSave up to £6,538 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
£8,478 GBP