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Heart|Natural|IGI

1.23ct J SI2 Heart Natural Diamond

VG • J/SI2 • IGI 734534502

Shape and cutting style on the report: Heart brilliant

Certificate IGI 734534502

Diamond specifications and retailer prices

From £903 GBP
As of November 1, 2026
Save £1,298 GBP (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,200 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 734534502. Listed at 5 retailers as of November 1, 2026, with prices from £903 to £2,200, a £1,298 spread on the same certified stone. NZ Jewellers lists it at £2,200. 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
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle42.5°
OriginNatural
Grading LabIGI
CertificateIGI 734534502
Dimensions6.41 × 7.54 × 4.48 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizePointed
Top View
6.41 mm7.54 mm1.23 ctJ / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 734534502
Side View
Table 60.0%Crown 32.2°Girdle: MED-THKPavilion 42.5°Culet: NoneDepth 59.4%

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 1
Current: £2,200 GBP|Low: £903 GBP|High: £2,285 GBP|Avg: £1,336 GBP|-3.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 5£903 GBP
Retailer 2£903 GBP
Retailer 3£937 GBP
Retailer 6£1,166 GBP
Retailer 4£1,661 GBP
NZ Jewellers£2,200 GBP

28 data points across 6 retailers

5 retailers£903 GBP to £2,200 GBP

A
Cheapest Retailer
-
£903 GBP
A
Retailer 2
-
£903 GBP
View
A
Retailer 3
-
£937 GBP
View
Retailer 4
-
£1,661 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
NZ Jewellers
8e06775a-6f75-4528-b58d-a54a1aa91233 · Nov 3
£2,200 GBP
$2,945 USD
View
4 more retailers have this diamond
Prices start from £903 GBPSave up to £1,298 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 Heart
£903 GBP