CaratHunter
Plans
Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6552067400

Certificate GIA 6552067400

Diamond specifications and retailer prices

From £18,738 GBP
$25,107 USD
As of November 1, 2026
Save £13,406 GBP (42%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £32,144 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 6552067400. Listed at 15 retailers as of November 1, 2026, with prices from £18,738 to £32,144, a £13,406 spread on the same certified stone. MOH London lists it at £32,144. 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 angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6552067400
Dimensions8.64 × 8.69 × 5.41 mm
L/W Ratio1.01
Star length50%
Top View
8.64 mm8.69 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552067400
Side View
Table 58.0%Crown 33°Girdle: Slightly ThickPavilion 41.8°Culet: NoneDepth 62.4%

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: £32,144 GBP|Low: £18,738 GBP|High: £32,531 GBP|Avg: £23,172 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
November 2, 2026
Retailer 7£18,738 GBP
Retailer 8£20,020 GBP
Retailer 4£20,582 GBP
Retailer 9£20,733 GBP
Retailer 2£20,772 GBP
Retailer 11£21,439 GBP
Retailer 10£21,611 GBP
Retailer 12£22,297 GBP
Retailer 3£23,154 GBP
Retailer 5£24,861 GBP
Retailer 6£28,460 GBP
MOH London£32,144 GBP

40 data points across 12 retailers

15 retailers£18,738 GBP to £32,144 GBP

B+
Cheapest Retailer
-
£18,738 GBP
$25,107 USD
B+
Retailer 2
-
£19,385 GBP
CA$36,075 CAD
View
B+
Retailer 3
-
£20,020 GBP
$26,825 USD
View
B+
Retailer 4
-
£20,582 GBP
$27,577 USD
View
Retailer 5
-
£20,733 GBP
A$42,738 AUD
View
Price last confirmed 29 days ago
B+
Retailer 6
-
£20,772 GBP
View
B
Retailer 7
-
£21,439 GBP
$28,726 USD
View
B
Retailer 8
-
£21,611 GBP
$28,956 USD
View
B
Retailer 9
-
£22,297 GBP
$29,875 USD
View
B
Retailer 10
-
£22,583 GBP
$30,259 USD
View
B
Retailer 11
-
£23,154 GBP
$31,024 USD
View
B
Retailer 12
-
£24,039 GBP
$32,210 USD
View
B
Retailer 13
-
£24,861 GBP
€31,725 EUR
View
B
Retailer 14
-
£28,460 GBP
ZAR 616,039 ZAR
View
Most Expensive
B
MOH London
84B63B2F4 · Nov 1
£32,144 GBP
View
14 more retailers have this diamond
Prices start from £18,738 GBPSave up to £13,406 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
£18,738 GBP