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Heart|Natural|GIA

1.21ct H SI2 Heart Natural Diamond

ID • H/SI2 • GIA 1558163586

Certificate GIA 1558163586

Diamond specifications and retailer prices

From $2,908 AUD
As of November 6, 2026
Save $3,641 AUD (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,741 AUD at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded H 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 1558163586. Listed at 14 retailers as of November 2, 2026, with a 125% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
H
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558163586
Dimensions6.55 × 7.18 × 4.32 mm
L/W Ratio1.10
Culet sizeNone
Key to symbols
Twinning Wisp, Needle, Indented Natural
Top View
6.55 mm7.18 mm1.21 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558163586
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 60.1%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $7,741 AUD|Low: $2,908 AUD|High: $7,741 AUD|Avg: $4,460 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4$2,908 AUD
Retailer 9$3,097 AUD
Retailer 7$3,355 AUD
Retailer 8$3,509 AUD
Retailer 2$3,675 AUD
Retailer 6$3,870 AUD
Retailer 3$4,641 AUD
Retailer 5$6,549 AUD
NZ Jewellers$7,741 AUD

43 data points across 9 retailers

14 retailers$2,908 AUD to $6,549 AUD

A
Cheapest Retailer
-
$2,908 AUD
A
Retailer 2
-
$2,922 AUD
View
A
Retailer 3
-
$3,097 AUD
View
Final sale: no returns
Retailer 4
-
$3,355 AUD
View
Price last confirmed 15 days ago
Retailer 5
-
$3,509 AUD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
$3,551 AUD
View
B+
Retailer 7
-
$3,675 AUD
View
Retailer 8
-
$3,870 AUD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
$3,900 AUD
View
B+
Retailer 10
-
$3,900 AUD
View
B+
Retailer 11
-
$4,031 AUD
View
B+
Retailer 12
-
$4,641 AUD
View
B
Retailer 13
-
$6,549 AUD
View
Most Expensive
NZ Jewellers
947fbdde-43a0-4ecc-abb4-39f7641ae374 · Oct 21
$7,741 AUD
$5,319 USD
View
Price last confirmed 16 days ago
13 more retailers have this diamond
Prices start from $2,908 AUDSave up to $3,641 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
1.21ct Heart
$2,908 AUD