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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 $3,735 AUD
As of November 6, 2026
Save $4,740 AUD (56%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $8,475 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 2556719376. Listed at 23 retailers as of November 5, 2026, with prices from $3,735 to $8,475, a $4,740 spread on the same certified stone. NZ Jewellers lists it at $8,475. 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: $5,033 AUD|Low: $3,735 AUD|High: $8,220 AUD|Avg: $5,281 AUD|-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$3,735 AUD
Retailer 9$3,743 AUD
Retailer 7$4,279 AUD
Retailer 10$4,644 AUD
Retailer 4$4,718 AUD
Retailer 1$5,033 AUD
Retailer 5$5,206 AUD
Retailer 2$5,606 AUD
Retailer 6$5,937 AUD
Retailer 8$8,112 AUD

26 data points across 10 retailers

23 retailers$3,735 AUD to $8,475 AUD

B+
Cheapest Retailer
-
$3,735 AUD
B+
Retailer 2
-
$3,743 AUD
View
B
Retailer 3
-
$4,173 AUD
View
B+
Retailer 4
-
$4,279 AUD
View
B
Retailer 5
-
$4,318 AUD
View
B
Retailer 6
-
$4,488 AUD
View
Final sale: no returns
B
Retailer 7
-
$4,644 AUD
View
B
Retailer 8
-
$4,701 AUD
View
B
Retailer 9
-
$4,718 AUD
View
B
Retailer 10
-
$4,864 AUD
View
Retailer 11
-
$4,864 AUD
View
Price last confirmed 9 days ago
B
Retailer 12
-
$5,033 AUD
View
B
Retailer 13
-
$5,052 AUD
View
B
Retailer 14
-
$5,074 AUD
View
Retailer 15
-
$5,196 AUD
View
Price last confirmed 31 days ago
B
Retailer 16
-
$5,205 AUD
View
B
Retailer 17
-
$5,206 AUD
View
B
Retailer 18
-
$5,376 AUD
View
B
Retailer 19
-
$5,612 AUD
View
B
Retailer 20
-
$5,937 AUD
View
B
Retailer 21
-
$7,242 AUD
View
B
Retailer 22
-
$8,112 AUD
View
Most Expensive
B
NZ Jewellers
64a0fccb-8343-41c4-9706-32672873e768 · Nov 5
$8,475 AUD
$5,823 USD
View
22 more retailers have this diamond
Prices start from $3,735 AUDSave up to $4,740 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
$3,735 AUD