CaratHunter
Plans
Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 6382112830

Certificate GIA 6382112830

Diamond specifications and retailer prices

From $3,419 AUD
As of November 6, 2026
Save $4,656 AUD (58%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,075 AUD at NZ Jewellers · As of November 5, 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 6382112830. Listed at 20 retailers as of November 5, 2026, with prices from $3,419 to $8,075, a $4,656 spread on the same certified stone. NZ Jewellers lists it at $8,075. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6382112830
Dimensions6.70 × 7.12 × 4.18 mm
L/W Ratio1.06
Culet sizeNone
Top View
6.70 mm7.12 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6382112830
Side View
Table 56.0%CrownGirdle: VTN-ETKPavilionCulet: NoneDepth 58.7%

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 6
Current: $3,791 AUD|Low: $3,730 AUD|High: $7,655 AUD|Avg: $5,056 AUD|+0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 1$3,791 AUD
Retailer 7$4,151 AUD
Retailer 2$4,388 AUD
Retailer 8$4,813 AUD
Retailer 6$4,969 AUD
Retailer 3$5,395 AUD
Retailer 4$5,657 AUD
Retailer 5$7,545 AUD

39 data points across 8 retailers

20 retailers$3,419 AUD to $8,075 AUD

B+
Cheapest Retailer
-
$3,419 AUD
B+
Retailer 2
-
$3,791 AUD
View
B+
Retailer 3
-
$3,820 AUD
View
B
Retailer 4
-
$3,957 AUD
View
B
Retailer 5
-
$4,031 AUD
View
B
Retailer 6
-
$4,031 AUD
View
B
Retailer 7
-
$4,151 AUD
View
B
Retailer 8
-
$4,162 AUD
View
B
Retailer 9
-
$4,388 AUD
View
B
Retailer 10
-
$4,497 AUD
View
B
Retailer 11
-
$4,635 AUD
View
Retailer 12
-
$4,635 AUD
View
Price last confirmed 9 days ago
B
Retailer 13
-
$4,813 AUD
View
B
Retailer 14
-
$4,842 AUD
View
Retailer 15
-
$4,969 AUD
View
Price last confirmed 34 days ago
B
Retailer 16
-
$5,347 AUD
View
B
Retailer 17
-
$5,395 AUD
View
B
Retailer 18
-
$5,657 AUD
View
B
Retailer 19
-
$7,545 AUD
View
Most Expensive
B
NZ Jewellers
08aad0d8-8048-47ea-b6a4-44e956ae65b9 · Nov 5
$8,075 AUD
$5,548 USD
View
19 more retailers have this diamond
Prices start from $3,419 AUDSave up to $4,656 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
$3,419 AUD