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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 $3,604 NZD
As of November 6, 2026
Save $4,513 NZD (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,595 NZD 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: $9,595 NZD|Low: $3,604 NZD|High: $9,595 NZD|Avg: $5,528 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4$3,604 NZD
Retailer 9$3,839 NZD
Retailer 7$4,158 NZD
Retailer 8$4,349 NZD
Retailer 2$4,555 NZD
Retailer 6$4,797 NZD
Retailer 3$5,753 NZD
Retailer 5$8,118 NZD
NZ Jewellers$9,595 NZD

43 data points across 9 retailers

14 retailers$3,604 NZD to $8,118 NZD

A
Cheapest Retailer
-
$3,604 NZD
A
Retailer 2
-
$3,622 NZD
View
A
Retailer 3
-
$3,839 NZD
View
Final sale: no returns
Retailer 4
-
$4,158 NZD
View
Price last confirmed 15 days ago
Retailer 5
-
$4,349 NZD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
$4,402 NZD
View
B+
Retailer 7
-
$4,555 NZD
View
Retailer 8
-
$4,797 NZD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
$4,834 NZD
View
B+
Retailer 10
-
$4,834 NZD
View
B+
Retailer 11
-
$4,997 NZD
View
B+
Retailer 12
-
$5,753 NZD
View
B
Retailer 13
-
$8,118 NZD
View
Most Expensive
NZ Jewellers
947fbdde-43a0-4ecc-abb4-39f7641ae374 · Oct 21
$9,595 NZD
$5,319 USD
View
Price last confirmed 16 days ago
13 more retailers have this diamond
Prices start from $3,604 NZDSave up to $4,513 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.

A
1.21ct Heart
$3,604 NZD