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Heart|Natural|GIA

1.00ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 6421196620

Certificate GIA 6421196620

Diamond specifications and retailer prices

From $1,658 AUD
As of November 6, 2026
Save $4,042 AUD (71%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,699 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6421196620. Listed at 16 retailers as of November 5, 2026, with prices from $1,658 to $5,699, a $4,042 spread on the same certified stone. NZ Jewellers lists it at $5,699. 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

1.00
Carat
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6421196620
Dimensions6.38 × 6.73 × 3.62 mm
L/W Ratio1.05
Top View
6.38 mm6.73 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6421196620
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 53.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,658 AUD|Low: $1,591 AUD|High: $4,142 AUD|Avg: $2,533 AUD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$1,658 AUD
Retailer 5$1,694 AUD
Retailer 6$2,155 AUD
Retailer 7$2,444 AUD
Retailer 3$2,591 AUD
Retailer 2$3,173 AUD
Retailer 4$4,082 AUD

43 data points across 7 retailers

16 retailers$1,658 AUD to $5,699 AUD

A
Cheapest Retailer
-
$1,658 AUD
A
Retailer 2
-
$1,694 AUD
View
B+
Retailer 3
-
$2,155 AUD
View
Final sale: no returns
B+
Retailer 4
-
$2,244 AUD
View
Retailer 5
-
$2,336 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$2,336 AUD
View
B+
Retailer 7
-
$2,353 AUD
View
B+
Retailer 8
-
$2,353 AUD
View
B+
Retailer 9
-
$2,444 AUD
View
B+
Retailer 10
-
$2,560 AUD
View
B+
Retailer 11
-
$2,591 AUD
View
B
Retailer 12
-
$2,695 AUD
View
B
Retailer 13
-
$3,173 AUD
View
B
Retailer 14
-
$4,082 AUD
View
B
Retailer 15
-
$4,912 AUD
View
Most Expensive
C
NZ Jewellers
228d1c5b-7ff2-4645-a657-2199bf30e83c · Nov 5
$5,699 AUD
$3,916 USD
View
15 more retailers have this diamond
Prices start from $1,658 AUDSave up to $4,042 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.

A
1.00ct Heart
$1,658 AUD