Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 6541235789

Certificate GIA 6541235789

Diamond specifications and retailer prices

From $3,467 NZD
As of November 7, 2026
13 retailers carry this diamond
Most expensive: $7,733 NZD 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: $7,733 NZD|Low: $2,354 NZD|High: $8,009 NZD|Avg: $3,726 NZD|-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$2,354 NZD
Retailer 2$2,408 NZD
Retailer 14$2,928 NZD
Retailer 7$3,095 NZD
Retailer 10$3,171 NZD
Retailer 3$3,218 NZD
Retailer 13$3,283 NZD
Retailer 12$3,301 NZD
Retailer 8$3,317 NZD
Retailer 11$3,485 NZD
Retailer 4$3,658 NZD
Retailer 6$4,382 NZD
Retailer 5$5,652 NZD
NZ Jewellers$7,733 NZD

26 data points across 14 retailers

13 retailers

Retailer 1
-
$2,354 NZD
Price last confirmed 13 days ago
Retailer 2
-
$2,408 NZD
View
Price last confirmed 14 days ago
Retailer 3
-
$3,171 NZD
View
Price last confirmed 16 days ago
Retailer 4
-
$3,218 NZD
View
Price last confirmed 14 days ago
Retailer 5
-
$3,283 NZD
View
Price last confirmed 15 days ago
Retailer 6
-
$3,301 NZD
View
Price last confirmed 15 days ago
Retailer 7
-
$3,317 NZD
View
Price last confirmed 16 days ago
B+
Retailer 8
-
$3,467 NZD
View
Retailer 9
-
$3,485 NZD
View
Price last confirmed 14 days ago
Retailer 10
-
$3,658 NZD
View
Price last confirmed 15 days ago
Retailer 11
-
$4,382 NZD
View
Price last confirmed 33 days ago
Retailer 12
-
$5,652 NZD
View
Price last confirmed 19 days ago
Most Expensive
NZ Jewellers
f1a2d860-d537-431d-b040-66519a43dec2 · Oct 24
$7,733 NZD
$4,287 USD
View
Price last confirmed 13 days ago
12 more retailers have this diamond
Prices start from $3,467 NZD

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
$3,467 NZD