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Round|Natural|IGI

1.23ct J VS1 Round Natural Diamond

EX • J/VS1 • IGI 613369271

Shape and cutting style on the report: Round brilliant

Certificate IGI 613369271

Diamond specifications and retailer prices

From £1,586 GBP
As of November 4, 2026
Save £1,482 GBP (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,805 GBP at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI 613369271. Listed at 15 retailers as of November 4, 2026, with a 93% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
J
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.6°
OriginNatural
Grading LabIGI
CertificateIGI 613369271
Dimensions6.87 × 6.84 × 4.24 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.87 mm6.84 mm1.23 ctJ / VS1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 613369271
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,805 GBP|Low: £1,586 GBP|High: £3,805 GBP|Avg: £2,203 GBP|+2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£1,586 GBP
Retailer 9£1,645 GBP
Retailer 8£1,753 GBP
Retailer 10£1,777 GBP
Retailer 2£1,930 GBP
Retailer 3£2,014 GBP
Retailer 5£2,143 GBP
Retailer 4£2,175 GBP
Retailer 7£3,067 GBP
NZ Jewellers£3,805 GBP

29 data points across 10 retailers

15 retailers£1,586 GBP to £3,067 GBP

A
Cheapest Retailer
-
£1,586 GBP
A
Retailer 2
-
£1,645 GBP
View
Retailer 3
-
£1,729 GBP
View
Price last confirmed 102 days ago
A
Retailer 4
-
£1,753 GBP
View
Retailer 5
-
£1,777 GBP
View
Price last confirmed 44 days ago
Retailer 6
-
£1,777 GBP
View
Price last confirmed 15 days ago
Retailer 7
-
£1,820 GBP
View
Price last confirmed 21 days ago
A
Retailer 8
-
£1,930 GBP
View
B+
Retailer 9
-
£2,014 GBP
View
Retailer 10
-
£2,051 GBP
View
Price last confirmed 45 days ago
B+
Retailer 11
-
£2,143 GBP
View
B+
Retailer 12
-
£2,175 GBP
View
B
Retailer 13
-
£3,067 GBP
View
Retailer 14
-
£3,715 GBP
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
a4acdb90-10ba-4c17-92fa-a52541d8be25 · Oct 20
£3,805 GBP
$5,121 USD
View
Price last confirmed 17 days ago
14 more retailers have this diamond
Prices start from £1,586 GBPSave up to £1,482 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
1.23ct Round
£1,586 GBP