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2.51ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 6545165280

Certificate GIA 6545165280

Diamond specifications and retailer prices

From £16,195 GBP
$21,700 USD
As of October 31, 2026
Save £9,645 GBP (37%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £25,840 GBP at MOH London · As of October 29, 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6545165280. Listed at 7 retailers as of October 29, 2026, with prices from £16,195 to £25,840, a £9,645 spread on the same certified stone. MOH London lists it at £25,840. 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6545165280
Dimensions8.64 × 8.58 × 5.46 mm
L/W Ratio1.01
Top View
8.64 mm8.58 mm2.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545165280
Side View
Table 56.0%Crown 36°Girdle: THN-THNPavilion 41.2°Culet: NoneDepth 63.4%

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 31
Current: £25,840 GBP|Low: £16,195 GBP|High: £27,289 GBP|Avg: £20,390 GBP|-5.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 6£16,195 GBP
Retailer 5£16,503 GBP
Retailer 10£17,671 GBP
Retailer 3£19,039 GBP
Retailer 4£19,074 GBP
Retailer 9£19,436 GBP
Retailer 7£19,679 GBP
Retailer 2£22,710 GBP
Retailer 8£23,314 GBP
MOH London£25,840 GBP

28 data points across 10 retailers

7 retailers£16,195 GBP to £25,840 GBP

A
Cheapest Retailer
-
£16,195 GBP
$21,700 USD
A
Retailer 2
-
£16,503 GBP
$22,112 USD
View
B+
Retailer 3
-
£19,039 GBP
View
Retailer 4
-
£19,074 GBP
$25,557 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£19,679 GBP
$26,368 USD
View
B
Retailer 6
-
£23,314 GBP
$31,238 USD
View
Most Expensive
B
MOH London
0872B4462 · Oct 29
£25,840 GBP
View
6 more retailers have this diamond
Prices start from £16,195 GBPSave up to £9,645 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
£16,195 GBP