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Heart|Natural|IGI

1.21ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 726507508

Shape and cutting style on the report: Heart brilliant

Certificate IGI 726507508

Diamond specifications and retailer prices

From $2,732 AUD
As of November 5, 2026
Save $3,589 AUD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,321 AUD at NZ Jewellers · As of September 20, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 726507508. Listed at 13 retailers as of November 5, 2026, with a 131% 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

1.21
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.6°
Pavilion angle38.7°
OriginNatural
Grading LabIGI
CertificateIGI 726507508
Dimensions6.46 × 7.29 × 4.28 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Top View
6.46 mm7.29 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 726507508
Side View
Table 58.0%Crown 38.6°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 58.7%

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 5
Current: $3,330 AUD|Low: $2,732 AUD|High: $5,360 AUD|Avg: $3,506 AUD|+3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 4$2,732 AUD
Retailer 6$2,940 AUD
Retailer 5$3,064 AUD
Retailer 1$3,330 AUD
Retailer 2$3,689 AUD
Retailer 3$5,282 AUD

43 data points across 6 retailers

13 retailers$2,732 AUD to $6,321 AUD

A
Cheapest Retailer
-
$2,732 AUD
Retailer 2
-
$3,023 AUD
View
Price last confirmed 46 days ago
B+
Retailer 3
-
$3,023 AUD
View
Retailer 4
-
$3,023 AUD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$3,064 AUD
View
B+
Retailer 6
-
$3,163 AUD
View
B+
Retailer 7
-
$3,330 AUD
View
Retailer 8
-
$3,489 AUD
View
Price last confirmed 44 days ago
B+
Retailer 9
-
$3,489 AUD
View
B+
Retailer 10
-
$3,689 AUD
View
B
Retailer 11
-
$5,282 AUD
View
C
Retailer 12
-
$6,321 AUD
View
Most Expensive
NZ Jewellers
2a16426c-cd62-4a91-b4ed-b2e3d80f3e91 · Sep 20
$6,321 AUD
$4,343 USD
View
Price last confirmed 47 days ago
12 more retailers have this diamond
Prices start from $2,732 AUDSave up to $3,589 AUD

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
$2,732 AUD