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Heart|Natural|IGI

1.35ct F SI1 Heart Natural Diamond

EX • F/SI1 • IGI 647429821

Shape and cutting style on the report: Cushion brilliant

Certificate IGI 647429821

Diamond specifications and retailer prices

From $5,263 AUD
As of November 5, 2026
Save $2,038 AUD (28%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $10,016 AUD at MOH London · As of October 25, 2026
View at MOH London

About this 1.35ct natural heart diamond

This 1.35ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 647429821. Listed at 11 retailers as of November 5, 2026, with a 39% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.35
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle36°
OriginNatural
Grading LabIGI
CertificateIGI 647429821
Dimensions6.77 × 6.07 × 3.91 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizePointed
Top View
6.77 mm6.07 mm1.35 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 647429821
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 36°Culet: NoneDepth 64.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $10,016 AUD|Low: $5,060 AUD|High: $10,123 AUD|Avg: $6,993 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 7$5,263 AUD
Retailer 8$5,462 AUD
Retailer 6$5,520 AUD
Retailer 3$5,801 AUD
Retailer 2$6,187 AUD
Retailer 5$6,730 AUD
Retailer 4$7,300 AUD
Retailer 9$9,897 AUD
MOH London$10,016 AUD

33 data points across 9 retailers

11 retailers$5,263 AUD to $7,300 AUD

B+
Cheapest Retailer
-
$5,263 AUD
Retailer 2
-
$5,462 AUD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
$5,520 AUD
View
Final sale: no returns
B+
Retailer 4
-
$5,691 AUD
View
B+
Retailer 5
-
$5,801 AUD
View
B+
Retailer 6
-
$6,187 AUD
View
B+
Retailer 7
-
$6,196 AUD
View
B+
Retailer 8
-
$6,730 AUD
View
B+
Retailer 9
-
$7,300 AUD
View
Retailer 10
-
$9,897 AUD
View
Price last confirmed 29 days ago
Most Expensive
MOH London
05ABB381A · Oct 25
$10,016 AUD
£5,419 GBP
View
Price last confirmed 13 days ago
10 more retailers have this diamond
Prices start from $5,263 AUDSave up to $2,038 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.

B+
1.35ct Heart
$5,263 AUD