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Heart|Natural|GIA

1.21ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 2434019421

Certificate GIA 2434019421

Diamond specifications and retailer prices

From $2,886 NZD
As of November 6, 2026
Save $3,927 NZD (58%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,813 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2434019421. Listed at 12 retailers as of November 4, 2026, with prices from $2,886 to $6,813, a $3,927 spread on the same certified stone. MOH London lists it at $6,813. 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2434019421
Dimensions6.20 × 5.86 × 4.10 mm
L/W Ratio1.06
Top View
6.20 mm5.86 mm1.21 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2434019421
Side View
Table 61.0%CrownGirdle: ThickPavilionCulet: NoneDepth 69.9%

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: $6,813 NZD|Low: $2,863 NZD|High: $6,903 NZD|Avg: $4,138 NZD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 8$2,886 NZD
Retailer 10$3,449 NZD
Retailer 13$3,521 NZD
Retailer 5$3,657 NZD
Retailer 11$3,721 NZD
Retailer 9$3,898 NZD
Retailer 2$3,987 NZD
Retailer 3$4,095 NZD
Retailer 12$4,149 NZD
Retailer 7$4,236 NZD
Retailer 4$4,697 NZD
Retailer 6$4,840 NZD
MOH London$6,813 NZD

31 data points across 13 retailers

12 retailers$2,886 NZD to $6,813 NZD

A
Cheapest Retailer
-
$2,886 NZD
B+
Retailer 2
-
$3,449 NZD
View
B+
Retailer 3
-
$3,521 NZD
View
B+
Retailer 4
-
$3,721 NZD
View
Retailer 5
-
$3,898 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$3,987 NZD
View
B+
Retailer 7
-
$4,025 NZD
View
B
Retailer 8
-
$4,095 NZD
View
B
Retailer 9
-
$4,149 NZD
View
B
Retailer 10
-
$4,236 NZD
View
B
Retailer 11
-
$4,840 NZD
View
Most Expensive
B
MOH London
AEE3F3158 · Nov 4
$6,813 NZD
£2,974 GBP
View
11 more retailers have this diamond
Prices start from $2,886 NZDSave up to $3,927 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
$2,886 NZD