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2.50ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 670478879

Shape and cutting style on the report: Round brilliant

Certificate IGI 670478879

Diamond specifications and retailer prices

From £9,082 GBP
$12,169 USD
As of October 30, 2026
Save £5,699 GBP (39%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £14,781 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 2.5ct natural round diamond

This 2.5ct natural round sits in the two to three carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670478879. Listed at 13 retailers as of October 30, 2026, with prices from £9,082 to £14,781, a £5,699 spread on the same certified stone. NZ Jewellers lists it at £14,781. 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

2.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 670478879
Dimensions8.64 × 8.72 × 5.34 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
8.64 mm8.72 mm2.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670478879
Side View
Table 60.0%Crown 34.1°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 61.5%

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: Oct 30
Current: £9,665 GBP|Low: £8,158 GBP|High: £13,831 GBP|Avg: £10,459 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 3£8,968 GBP
Retailer 2£9,082 GBP
Retailer 7£9,381 GBP
Retailer 1£9,665 GBP
Retailer 9£9,790 GBP
Retailer 8£10,442 GBP
Retailer 11£10,605 GBP
Retailer 10£11,013 GBP
Retailer 4£11,176 GBP
Retailer 6£12,198 GBP
Retailer 5£13,739 GBP

41 data points across 11 retailers

13 retailers£9,082 GBP to £14,781 GBP

A
Cheapest Retailer
-
£9,082 GBP
$12,169 USD
B+
Retailer 2
-
£9,381 GBP
$12,570 USD
View
Final sale: no returns
B+
Retailer 3
-
£9,624 GBP
$12,895 USD
View
A
Retailer 4
-
£9,665 GBP
View
B+
Retailer 5
-
£9,790 GBP
$13,117 USD
View
B+
Retailer 6
-
£10,442 GBP
$13,991 USD
View
B+
Retailer 7
-
£10,605 GBP
$14,210 USD
View
B+
Retailer 8
-
£10,867 GBP
$14,560 USD
View
B+
Retailer 9
-
£11,013 GBP
$14,756 USD
View
B+
Retailer 10
-
£11,176 GBP
€14,261 EUR
View
B+
Retailer 11
-
£12,198 GBP
ZAR 264,035 ZAR
View
B
Retailer 12
-
£13,739 GBP
View
Most Expensive
B
NZ Jewellers
d4324a38-5c97-4e14-9532-3d9ceabba2dd · Oct 30
£14,781 GBP
$19,805 USD
View
12 more retailers have this diamond
Prices start from £9,082 GBPSave up to £5,699 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
2.50ct Round
£9,082 GBP