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2.51ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 6552970879

Certificate GIA 6552970879

Diamond specifications and retailer prices

From £11,470 GBP
SGD 20,768 SGD
As of October 28, 2026
Save £6,276 GBP (35%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £17,745 GBP at Helzberg Diamonds · As of October 27, 2026
View at Helzberg Diamonds

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 6552970879. Listed at 10 retailers as of October 27, 2026, with prices from £11,470 to £17,745, a £6,276 spread on the same certified stone. Helzberg Diamonds lists it at £17,745. 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
FluorescenceStrong
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6552970879
Dimensions8.64 × 8.68 × 5.39 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.64 mm8.68 mm2.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6552970879
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.3%

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 28
Current: £17,745 GBP|Low: £11,470 GBP|High: £19,234 GBP|Avg: £14,203 GBP|-7.7%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 28, 2026
Retailer 2£11,470 GBP
Retailer 5£12,044 GBP
Retailer 7£12,191 GBP
Retailer 6£12,418 GBP
Retailer 4£12,566 GBP
Retailer 3£14,052 GBP
Retailer 10£14,177 GBP
Retailer 8£14,284 GBP
Retailer 9£14,921 GBP
Helzberg Diamonds£17,745 GBP

38 data points across 10 retailers

10 retailers£11,470 GBP to £17,745 GBP

A
Cheapest Retailer
-
£11,470 GBP
SGD 20,768 SGD
A
Retailer 2
-
£12,044 GBP
View
Retailer 3
-
£12,191 GBP
$16,335 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
£12,418 GBP
SGD 22,484 SGD
View
A
Retailer 5
-
£12,566 GBP
$16,837 USD
View
A
Retailer 6
-
£14,052 GBP
€17,932 EUR
View
A
Retailer 7
-
£14,177 GBP
$18,995 USD
View
A
Retailer 8
-
£14,284 GBP
$19,139 USD
View
A
Retailer 9
-
£14,921 GBP
$19,993 USD
View
Most Expensive
B+
Helzberg Diamonds
XZRMLLIPNGONP · Oct 27
£17,745 GBP
$23,777 USD
View
9 more retailers have this diamond
Prices start from £11,470 GBPSave up to £6,276 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
£11,470 GBP