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Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2566649853

Certificate GIA 2566649853

Diamond specifications and retailer prices

From £16,250 GBP
HK$170,100 HKD
As of November 1, 2026
Save £13,805 GBP (46%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £30,055 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 2566649853. Listed at 19 retailers as of November 1, 2026, with prices from £16,250 to £30,055, a £13,805 spread on the same certified stone. MOH London lists it at £30,055. 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
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566649853
Dimensions8.65 × 8.69 × 5.36 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.65 mm8.69 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566649853
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

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: £30,055 GBP|Low: £16,221 GBP|High: £30,216 GBP|Avg: £21,084 GBP|-0.5%
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
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 4£16,250 GBP
Retailer 8£16,420 GBP
Retailer 12£16,636 GBP
Retailer 3£17,285 GBP
Retailer 5£17,521 GBP
Retailer 11£18,240 GBP
Retailer 16£18,733 GBP
Retailer 17£19,244 GBP
Retailer 14£19,255 GBP
Retailer 6£20,046 GBP
Retailer 18£20,207 GBP
Retailer 19£20,848 GBP
Retailer 13£21,226 GBP
Retailer 7£21,650 GBP
Retailer 10£21,876 GBP
Retailer 2£23,246 GBP
Retailer 15£26,611 GBP
Retailer 9£26,875 GBP
MOH London£30,055 GBP

16 data points across 19 retailers

19 retailers£16,250 GBP to £30,055 GBP

A
Cheapest Retailer
-
£16,250 GBP
HK$170,100 HKD
Retailer 2
-
£16,420 GBP
₹2,095,301 INR
View
Price last confirmed 7 days ago
A
Retailer 3
-
£16,636 GBP
$22,290 USD
View
A
Retailer 4
-
£17,285 GBP
$23,160 USD
View
A
Retailer 5
-
£17,521 GBP
$23,476 USD
View
Retailer 6
-
£18,628 GBP
$24,960 USD
View
Price last confirmed 14 days ago
B+
Retailer 7
-
£18,733 GBP
$25,100 USD
View
B+
Retailer 8
-
£19,244 GBP
$25,785 USD
View
B+
Retailer 9
-
£19,255 GBP
View
B+
Retailer 10
-
£20,046 GBP
$26,860 USD
View
B+
Retailer 11
-
£20,207 GBP
$27,075 USD
View
B+
Retailer 12
-
£20,848 GBP
$27,934 USD
View
B+
Retailer 13
-
£21,226 GBP
View
B+
Retailer 14
-
£21,650 GBP
$29,009 USD
View
Retailer 15
-
£21,876 GBP
$29,311 USD
View
Price last confirmed 8 days ago
B
Retailer 16
-
£23,246 GBP
€29,664 EUR
View
B
Retailer 17
-
£26,611 GBP
ZAR 576,015 ZAR
View
Retailer 18
-
£26,875 GBP
$36,009 USD
View
Price last confirmed 7 days ago
Most Expensive
B
MOH London
6829E11F8 · Nov 1
£30,055 GBP
View
18 more retailers have this diamond
Prices start from £16,250 GBPSave up to £13,805 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
£16,250 GBP