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Oval|Natural|IGI

1.23ct J SI1 Oval Natural Diamond

VG • J/SI1 • IGI 747550042

Shape and cutting style on the report: Oval brilliant

Certificate IGI 747550042

Diamond specifications and retailer prices

From £1,230 GBP
As of November 2, 2026
Save £1,847 GBP (60%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,077 GBP at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.23ct natural oval diamond

This 1.23ct natural oval sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 747550042. Listed at 7 retailers as of November 2, 2026, with prices from £1,230 to £3,077, a £1,847 spread on the same certified stone. NZ Jewellers lists it at £3,077. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle37.1°
OriginNatural
Grading LabIGI
CertificateIGI 747550042
Dimensions8.62 × 5.74 × 3.72 mm
L/W Ratio1.50
Girdle conditionFaceted
Culet sizePointed
Top View
8.62 mm5.74 mm1.23 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 747550042
Side View
Table 59.0%Crown 38.4°Girdle: MED-THKPavilion 37.1°Culet: NoneDepth 64.8%

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 2
Current: £3,077 GBP|Low: £1,198 GBP|High: £3,151 GBP|Avg: £1,725 GBP|-2.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£1,230 GBP
Retailer 2£1,235 GBP
Retailer 7£1,261 GBP
Retailer 6£1,319 GBP
Retailer 3£1,326 GBP
Retailer 5£2,209 GBP
NZ Jewellers£3,077 GBP

41 data points across 7 retailers

7 retailers£1,230 GBP to £3,077 GBP

A
Cheapest Retailer
-
£1,230 GBP
A
Retailer 2
-
£1,235 GBP
View
A
Retailer 3
-
£1,261 GBP
View
B+
Retailer 4
-
£1,319 GBP
View
A
Retailer 5
-
£1,326 GBP
View
B
Retailer 6
-
£2,209 GBP
View
Most Expensive
B
NZ Jewellers
73c26d6c-d7c4-4129-ab6a-991a45b7109b · Nov 2
£3,077 GBP
$4,118 USD
View
6 more retailers have this diamond
Prices start from £1,230 GBPSave up to £1,847 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 Oval
£1,230 GBP