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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 6382112830

Certificate GIA 6382112830

Diamond specifications and retailer prices

From $4,237 NZD
As of November 6, 2026
Save $5,771 NZD (58%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $10,008 NZD 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 $4,237 to $10,008, a $5,771 spread on the same certified stone. NZ Jewellers lists it at $10,008. 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: $4,699 NZD|Low: $4,623 NZD|High: $9,489 NZD|Avg: $6,267 NZD|+0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 1$4,699 NZD
Retailer 7$5,145 NZD
Retailer 2$5,439 NZD
Retailer 8$5,965 NZD
Retailer 6$6,159 NZD
Retailer 3$6,687 NZD
Retailer 4$7,012 NZD
Retailer 5$9,351 NZD

39 data points across 8 retailers

20 retailers$4,237 NZD to $10,008 NZD

B+
Cheapest Retailer
-
$4,237 NZD
B+
Retailer 2
-
$4,699 NZD
View
B+
Retailer 3
-
$4,735 NZD
View
B
Retailer 4
-
$4,905 NZD
View
B
Retailer 5
-
$4,997 NZD
View
B
Retailer 6
-
$4,997 NZD
View
B
Retailer 7
-
$5,145 NZD
View
B
Retailer 8
-
$5,159 NZD
View
B
Retailer 9
-
$5,439 NZD
View
B
Retailer 10
-
$5,574 NZD
View
B
Retailer 11
-
$5,745 NZD
View
Retailer 12
-
$5,745 NZD
View
Price last confirmed 9 days ago
B
Retailer 13
-
$5,965 NZD
View
B
Retailer 14
-
$6,002 NZD
View
Retailer 15
-
$6,159 NZD
View
Price last confirmed 34 days ago
B
Retailer 16
-
$6,628 NZD
View
B
Retailer 17
-
$6,687 NZD
View
B
Retailer 18
-
$7,012 NZD
View
B
Retailer 19
-
$9,351 NZD
View
Most Expensive
B
NZ Jewellers
08aad0d8-8048-47ea-b6a4-44e956ae65b9 · Nov 5
$10,008 NZD
$5,548 USD
View
19 more retailers have this diamond
Prices start from $4,237 NZDSave up to $5,771 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
$4,237 NZD