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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2235674968

Certificate GIA 2235674968

Diamond specifications and retailer prices

From £16,081 GBP
$21,580 USD
As of November 1, 2026
Save £10,638 GBP (40%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £26,719 GBP at Cape Diamonds · As of November 1, 2026
View at Cape Diamonds

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2235674968. Listed at 12 retailers as of November 1, 2026, with prices from £16,081 to £26,719, a £10,638 spread on the same certified stone. Cape Diamonds lists it at £26,719. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2235674968
Dimensions8.61 × 8.65 × 5.41 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.61 mm8.65 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235674968
Side View
Table 56.0%Crown 35.5°Girdle: STK-STKPavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £26,719 GBP|Low: £16,081 GBP|High: £26,719 GBP|Avg: £20,379 GBP|+2.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 6£16,081 GBP
Retailer 8£17,592 GBP
Retailer 10£18,809 GBP
Retailer 2£19,496 GBP
Retailer 7£19,782 GBP
Retailer 12£19,865 GBP
Retailer 3£20,493 GBP
Retailer 11£20,493 GBP
Retailer 4£21,171 GBP
Retailer 5£21,989 GBP
Retailer 9£22,192 GBP
Cape Diamonds£26,719 GBP

43 data points across 12 retailers

12 retailers£16,081 GBP to £26,719 GBP

B+
Cheapest Retailer
-
£16,081 GBP
$21,580 USD
B+
Retailer 2
-
£17,592 GBP
$23,608 USD
View
B
Retailer 3
-
£18,809 GBP
$25,240 USD
View
B+
Retailer 4
-
£19,496 GBP
View
B+
Retailer 5
-
£19,782 GBP
$26,546 USD
View
B
Retailer 6
-
£19,865 GBP
$26,658 USD
View
B
Retailer 7
-
£20,493 GBP
$27,500 USD
View
B
Retailer 8
-
£20,493 GBP
$27,500 USD
View
B
Retailer 9
-
£21,171 GBP
$28,410 USD
View
B
Retailer 10
-
£21,989 GBP
€28,103 EUR
View
B
Retailer 11
-
£22,192 GBP
$29,781 USD
View
Most Expensive
B
Cape Diamonds
cert_2235674968 · Nov 1
£26,719 GBP
ZAR 579,252 ZAR
View
11 more retailers have this diamond
Prices start from £16,081 GBPSave up to £10,638 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.

B+
2.51ct Round
£16,081 GBP