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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

ID • J/SI1 • GIA 2556719376

Certificate GIA 2556719376

Diamond specifications and retailer prices

From $4,629 NZD
As of November 6, 2026
Save $5,875 NZD (56%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $10,504 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 2556719376. Listed at 23 retailers as of November 5, 2026, with prices from $4,629 to $10,504, a $5,875 spread on the same certified stone. NZ Jewellers lists it at $10,504. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle39.38°
Pavilion angle38.46°
OriginNatural
Grading LabGIA
CertificateGIA 2556719376
Dimensions6.34 × 7.24 × 4.30 mm
L/W Ratio1.14
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
6.34 mm7.24 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2556719376
Side View
Table 61.0%Crown 39.38°Girdle: STK-VTKPavilion 38.46°Culet: NoneDepth 59.3%

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: $6,238 NZD|Low: $4,629 NZD|High: $10,188 NZD|Avg: $6,546 NZD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$4,629 NZD
Retailer 9$4,640 NZD
Retailer 7$5,303 NZD
Retailer 10$5,756 NZD
Retailer 4$5,848 NZD
Retailer 1$6,238 NZD
Retailer 5$6,453 NZD
Retailer 2$6,949 NZD
Retailer 6$7,358 NZD
Retailer 8$10,055 NZD

26 data points across 10 retailers

23 retailers$4,629 NZD to $10,504 NZD

B+
Cheapest Retailer
-
$4,629 NZD
B+
Retailer 2
-
$4,640 NZD
View
B
Retailer 3
-
$5,172 NZD
View
B+
Retailer 4
-
$5,303 NZD
View
B
Retailer 5
-
$5,352 NZD
View
B
Retailer 6
-
$5,563 NZD
View
Final sale: no returns
B
Retailer 7
-
$5,756 NZD
View
B
Retailer 8
-
$5,827 NZD
View
B
Retailer 9
-
$5,848 NZD
View
B
Retailer 10
-
$6,029 NZD
View
Retailer 11
-
$6,029 NZD
View
Price last confirmed 9 days ago
B
Retailer 12
-
$6,238 NZD
View
B
Retailer 13
-
$6,261 NZD
View
B
Retailer 14
-
$6,288 NZD
View
Retailer 15
-
$6,440 NZD
View
Price last confirmed 31 days ago
B
Retailer 16
-
$6,451 NZD
View
B
Retailer 17
-
$6,453 NZD
View
B
Retailer 18
-
$6,664 NZD
View
B
Retailer 19
-
$6,956 NZD
View
B
Retailer 20
-
$7,358 NZD
View
B
Retailer 21
-
$8,976 NZD
View
B
Retailer 22
-
$10,055 NZD
View
Most Expensive
B
NZ Jewellers
64a0fccb-8343-41c4-9706-32672873e768 · Nov 5
$10,504 NZD
$5,823 USD
View
22 more retailers have this diamond
Prices start from $4,629 NZDSave up to $5,875 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
$4,629 NZD