CaratHunter
Plans
Heart|Natural|IGI

1.21ct I SI2 Heart Natural Diamond

EX • I/SI2 • IGI 743558502

Shape and cutting style on the report: Heart brilliant

Certificate IGI 743558502

Diamond specifications and retailer prices

From £752 GBP
As of November 6, 2026
5 retailers carry this diamond
Most expensive: £2,059 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 743558502. Listed at 5 retailers as of November 6, 2026. 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

1.21
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle39.3°
OriginNatural
Grading LabIGI
CertificateIGI 743558502
Dimensions6.84 × 7.46 × 4.19 mm
L/W Ratio1.09
Girdle conditionFaceted
Top View
6.84 mm7.46 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 743558502
Side View
Table 62.0%Crown 33.3°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 56.2%

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: £2,059 GBP|Low: £534 GBP|High: £2,059 GBP|Avg: £938 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 1, 2026
Retailer 9£534 GBP
Retailer 10£579 GBP
Retailer 14£648 GBP
Retailer 4£752 GBP
Retailer 5£819 GBP
Retailer 12£844 GBP
Retailer 15£844 GBP
Retailer 8£876 GBP
Retailer 2£879 GBP
Retailer 13£899 GBP
Retailer 6£944 GBP
Retailer 3£974 GBP
Retailer 7£1,004 GBP
Retailer 11£1,562 GBP
NZ Jewellers£2,059 GBP

9 data points across 15 retailers

5 retailers

A
Cheapest Retailer
-
£752 GBP
Retailer 2
-
£844 GBP
View
Price last confirmed 40 days ago
Retailer 3
-
£876 GBP
View
Price last confirmed 37 days ago
Retailer 4
-
£974 GBP
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
2a47777f-4314-4185-bfb5-7795270a5ca8 · Sep 30
£2,059 GBP
$2,756 USD
View
Price last confirmed 37 days ago
4 more retailers have this diamond
Prices start from £752 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
1.21ct Heart
£752 GBP