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Round|Natural|IGI

1.23ct J VS1 Round Natural Diamond

GD • J/VS1 • IGI 782676152

Shape and cutting style on the report: Round brilliant

Certificate IGI 782676152

Diamond specifications and retailer prices

From £990 GBP
As of November 6, 2026
Save £2,222 GBP (69%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,473 GBP at NZ Jewellers · As of September 28, 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 standard cut grade and certified by IGI 782676152. Listed at 16 retailers as of November 5, 2026, with a 225% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
J
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle40.2°
Pavilion angle39.7°
OriginNatural
Grading LabIGI
CertificateIGI 782676152
Dimensions6.45 × 6.53 × 4.31 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.45 mm6.53 mm1.23 ctJ / VS1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateIGI 782676152
Side View
Table 57.0%Crown 40.2°Girdle: Very ThickPavilion 39.7°Culet: NoneDepth 66.3%

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 6
Current: £3,212 GBP|Low: £990 GBP|High: £3,360 GBP|Avg: £1,640 GBP|-4.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2£990 GBP
Retailer 6£1,144 GBP
Retailer 11£1,216 GBP
Retailer 9£1,300 GBP
Retailer 10£1,317 GBP
Retailer 3£1,328 GBP
Retailer 7£1,519 GBP
Retailer 4£1,607 GBP
Retailer 8£1,672 GBP
Retailer 5£2,300 GBP
NZ Jewellers£3,212 GBP

38 data points across 11 retailers

16 retailers£990 GBP to £3,212 GBP

A
Cheapest Retailer
-
£990 GBP
B+
Retailer 2
-
£1,144 GBP
View
B+
Retailer 3
-
£1,216 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,300 GBP
View
B+
Retailer 5
-
£1,317 GBP
View
Retailer 6
-
£1,328 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£1,424 GBP
View
Price last confirmed 39 days ago
Retailer 8
-
£1,441 GBP
View
Price last confirmed 38 days ago
B+
Retailer 9
-
£1,472 GBP
View
B+
Retailer 10
-
£1,519 GBP
View
Retailer 11
-
£1,589 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£1,607 GBP
View
B+
Retailer 13
-
£1,672 GBP
View
B
Retailer 14
-
£2,300 GBP
View
B
Retailer 15
-
£3,212 GBP
View
Most Expensive
NZ Jewellers
935c2a5b-654b-4e3e-8f70-24237596aaf0 · Sep 28
£3,473 GBP
$4,674 USD
View
Price last confirmed 39 days ago
15 more retailers have this diamond
Prices start from £990 GBPSave up to £2,222 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
£990 GBP