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2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2544271085

Certificate GIA 2544271085

Diamond specifications and retailer prices

From £17,032 GBP
$22,821 USD
As of October 31, 2026
Save £12,261 GBP (42%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £29,293 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 2544271085. Listed at 17 retailers as of October 31, 2026, with prices from £17,032 to £29,293, a £12,261 spread on the same certified stone. MOH London lists it at £29,293. 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 angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2544271085
Dimensions8.59 × 8.65 × 5.40 mm
L/W Ratio1.01
Top View
8.59 mm8.65 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2544271085
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: Oct 31
Current: £29,293 GBP|Low: £12,325 GBP|High: £29,647 GBP|Avg: £20,165 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 3£16,225 GBP
Retailer 6£17,032 GBP
Retailer 5£17,975 GBP
Retailer 7£18,263 GBP
Retailer 14£18,757 GBP
Retailer 9£18,765 GBP
Retailer 4£19,202 GBP
Retailer 13£19,694 GBP
Retailer 11£20,320 GBP
Retailer 2£20,986 GBP
Retailer 12£21,101 GBP
Retailer 8£22,657 GBP
Retailer 10£25,936 GBP
Retailer 15£26,572 GBP
MOH London£29,293 GBP

32 data points across 15 retailers

17 retailers£17,032 GBP to £29,293 GBP

Retailer 1
-
£16,225 GBP
$21,740 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
£17,032 GBP
$22,821 USD
View
B+
Retailer 3
-
£17,077 GBP
$22,881 USD
View
B+
Retailer 4
-
£17,975 GBP
$24,084 USD
View
Final sale: no returns
B+
Retailer 5
-
£18,263 GBP
$24,470 USD
View
B
Retailer 6
-
£18,757 GBP
$25,132 USD
View
B+
Retailer 7
-
£18,765 GBP
View
B
Retailer 8
-
£19,202 GBP
$25,729 USD
View
B
Retailer 9
-
£19,694 GBP
$26,388 USD
View
B
Retailer 10
-
£20,049 GBP
$26,863 USD
View
B
Retailer 11
-
£20,320 GBP
$27,226 USD
View
B+
Retailer 12
-
£20,986 GBP
View
B
Retailer 13
-
£21,101 GBP
$28,273 USD
View
B
Retailer 14
-
£22,657 GBP
€28,912 EUR
View
B
Retailer 15
-
£25,936 GBP
ZAR 561,411 ZAR
View
B
Retailer 16
-
£26,572 GBP
$35,603 USD
View
Most Expensive
B
MOH London
374279A59 · Nov 1
£29,293 GBP
View
16 more retailers have this diamond
Prices start from £17,032 GBPSave up to £12,261 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
£17,032 GBP