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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6535368098

Certificate GIA 6535368098

Diamond specifications and retailer prices

From £16,628 GBP
$22,280 USD
As of November 1, 2026
Save £13,121 GBP (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £29,749 GBP at MOH London · As of November 1, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6535368098. Listed at 13 retailers as of November 1, 2026, with prices from £16,628 to £29,749, a £13,121 spread on the same certified stone. MOH London lists it at £29,749. 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
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6535368098
Dimensions8.63 × 8.59 × 5.44 mm
L/W Ratio1.00
Top View
8.63 mm8.59 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6535368098
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 63.1%

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: £29,749 GBP|Low: £16,628 GBP|High: £30,107 GBP|Avg: £21,037 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4£16,628 GBP
Retailer 5£18,254 GBP
Retailer 2£19,409 GBP
Retailer 7£19,842 GBP
Retailer 6£20,000 GBP
Retailer 8£20,635 GBP
Retailer 9£21,429 GBP
Retailer 3£22,451 GBP
MOH London£29,749 GBP

40 data points across 9 retailers

13 retailers£16,628 GBP to £29,749 GBP

B+
Cheapest Retailer
-
£16,628 GBP
$22,280 USD
B+
Retailer 2
-
£17,515 GBP
$23,468 USD
View
B
Retailer 3
-
£18,254 GBP
$24,458 USD
View
Final sale: no returns
B+
Retailer 4
-
£19,409 GBP
View
B+
Retailer 5
-
£19,842 GBP
$26,586 USD
View
B
Retailer 6
-
£20,000 GBP
$26,798 USD
View
B
Retailer 7
-
£20,412 GBP
$27,350 USD
View
B
Retailer 8
-
£20,412 GBP
$27,350 USD
View
B
Retailer 9
-
£20,635 GBP
$27,649 USD
View
B
Retailer 10
-
£21,091 GBP
$28,260 USD
View
B
Retailer 11
-
£21,429 GBP
$28,712 USD
View
B
Retailer 12
-
£22,451 GBP
€28,649 EUR
View
Most Expensive
B
MOH London
2C311C6B1 · Nov 1
£29,749 GBP
View
12 more retailers have this diamond
Prices start from £16,628 GBPSave up to £13,121 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
£16,628 GBP