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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 $2,051 SGD
As of November 6, 2026
Save $2,790 SGD (58%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,841 SGD 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 $2,051 to $4,841, a $2,790 spread on the same certified stone. MOH London lists it at $4,841. 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: $4,841 SGD|Low: $2,034 SGD|High: $4,904 SGD|Avg: $2,940 SGD|-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$2,051 SGD
Retailer 10$2,450 SGD
Retailer 13$2,502 SGD
Retailer 5$2,598 SGD
Retailer 11$2,644 SGD
Retailer 9$2,770 SGD
Retailer 2$2,832 SGD
Retailer 3$2,909 SGD
Retailer 12$2,948 SGD
Retailer 7$3,009 SGD
Retailer 4$3,337 SGD
Retailer 6$3,439 SGD
MOH London$4,841 SGD

31 data points across 13 retailers

12 retailers$2,051 SGD to $4,841 SGD

A
Cheapest Retailer
-
$2,051 SGD
B+
Retailer 2
-
$2,450 SGD
View
B+
Retailer 3
-
$2,502 SGD
View
B+
Retailer 4
-
$2,644 SGD
View
Retailer 5
-
$2,770 SGD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$2,832 SGD
View
B+
Retailer 7
-
$2,859 SGD
View
B
Retailer 8
-
$2,909 SGD
View
B
Retailer 9
-
$2,948 SGD
View
B
Retailer 10
-
$3,009 SGD
View
B
Retailer 11
-
$3,439 SGD
View
Most Expensive
B
MOH London
AEE3F3158 · Nov 4
$4,841 SGD
£2,974 GBP
View
11 more retailers have this diamond
Prices start from $2,051 SGDSave up to $2,790 SGD

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
$2,051 SGD