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Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2547204671

Certificate GIA 2547204671

Diamond specifications and retailer prices

From £16,947 GBP
HK$177,400 HKD
As of November 1, 2026
Save £13,363 GBP (44%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £30,310 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2547204671. Listed at 18 retailers as of November 1, 2026, with prices from £16,947 to £30,310, a £13,363 spread on the same certified stone. MOH London lists it at £30,310. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2547204671
Dimensions8.67 × 8.63 × 5.37 mm
L/W Ratio1.00
Top View
8.67 mm8.63 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2547204671
Side View
Table 60.0%Crown 33.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 62.1%

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: Nov 1
Current: £30,310 GBP|Low: £16,947 GBP|High: £30,675 GBP|Avg: £21,746 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
November 1, 2026
Retailer 9£16,947 GBP
Retailer 3£19,408 GBP
Retailer 2£19,419 GBP
Retailer 6£19,558 GBP
Retailer 8£20,216 GBP
Retailer 7£20,378 GBP
Retailer 10£21,025 GBP
Retailer 11£21,833 GBP
Retailer 5£23,549 GBP
Retailer 4£26,836 GBP
MOH London£30,310 GBP

41 data points across 11 retailers

18 retailers£16,947 GBP to £30,310 GBP

A
Cheapest Retailer
-
£16,947 GBP
HK$177,400 HKD
A
Retailer 2
-
£17,669 GBP
$23,675 USD
View
B+
Retailer 3
-
£18,890 GBP
$25,310 USD
View
B+
Retailer 4
-
£19,408 GBP
$26,004 USD
View
B+
Retailer 5
-
£19,419 GBP
View
Retailer 6
-
£19,558 GBP
A$40,316 AUD
View
Price last confirmed 28 days ago
B+
Retailer 7
-
£19,869 GBP
$26,622 USD
View
B+
Retailer 8
-
£20,216 GBP
$27,087 USD
View
B+
Retailer 9
-
£20,378 GBP
$27,304 USD
View
B+
Retailer 10
-
£20,745 GBP
$27,796 USD
View
B+
Retailer 11
-
£20,957 GBP
$28,080 USD
View
B+
Retailer 12
-
£20,957 GBP
$28,080 USD
View
B+
Retailer 13
-
£21,025 GBP
$28,171 USD
View
B+
Retailer 14
-
£21,651 GBP
$29,010 USD
View
B+
Retailer 15
-
£21,833 GBP
$29,254 USD
View
B
Retailer 16
-
£23,549 GBP
€30,050 EUR
View
B
Retailer 17
-
£26,836 GBP
ZAR 580,895 ZAR
View
Most Expensive
B
MOH London
B5DB54B5F · Nov 1
£30,310 GBP
View
17 more retailers have this diamond
Prices start from £16,947 GBPSave up to £13,363 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
£16,947 GBP