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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 6541235789

Certificate GIA 6541235789

Diamond specifications and retailer prices

From $2,797 AUD
As of November 7, 2026
13 retailers carry this diamond
Most expensive: $6,239 AUD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541235789. Listed at 13 retailers as of November 7, 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6541235789
Dimensions6.77 × 7.26 × 4.24 mm
L/W Ratio1.07
Top View
6.77 mm7.26 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6541235789
Side View
Table 57.0%CrownGirdle: THN-XTKPavilionCulet: NoneDepth 58.4%

Caratlytics Score

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

Price History

Last verified: Nov 7
Current: $6,239 AUD|Low: $1,899 AUD|High: $6,462 AUD|Avg: $3,006 AUD|-3.4%
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
October 24, 2026
Retailer 9$1,899 AUD
Retailer 2$1,943 AUD
Retailer 14$2,362 AUD
Retailer 7$2,497 AUD
Retailer 10$2,559 AUD
Retailer 3$2,596 AUD
Retailer 13$2,649 AUD
Retailer 12$2,663 AUD
Retailer 8$2,676 AUD
Retailer 11$2,812 AUD
Retailer 4$2,952 AUD
Retailer 6$3,535 AUD
Retailer 5$4,560 AUD
NZ Jewellers$6,239 AUD

26 data points across 14 retailers

13 retailers

Retailer 1
-
$1,899 AUD
Price last confirmed 13 days ago
Retailer 2
-
$1,943 AUD
View
Price last confirmed 14 days ago
Retailer 3
-
$2,559 AUD
View
Price last confirmed 16 days ago
Retailer 4
-
$2,596 AUD
View
Price last confirmed 14 days ago
Retailer 5
-
$2,649 AUD
View
Price last confirmed 15 days ago
Retailer 6
-
$2,663 AUD
View
Price last confirmed 15 days ago
Retailer 7
-
$2,676 AUD
View
Price last confirmed 16 days ago
B+
Retailer 8
-
$2,797 AUD
View
Retailer 9
-
$2,812 AUD
View
Price last confirmed 14 days ago
Retailer 10
-
$2,952 AUD
View
Price last confirmed 15 days ago
Retailer 11
-
$3,535 AUD
View
Price last confirmed 33 days ago
Retailer 12
-
$4,560 AUD
View
Price last confirmed 19 days ago
Most Expensive
NZ Jewellers
f1a2d860-d537-431d-b040-66519a43dec2 · Oct 24
$6,239 AUD
$4,287 USD
View
Price last confirmed 13 days ago
12 more retailers have this diamond
Prices start from $2,797 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+
1.20ct Heart
$2,797 AUD