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Heart|Natural|GIA

1.21ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 5241078543

Certificate GIA 5241078543

Diamond specifications and retailer prices

From $2,427 SGD
As of November 6, 2026
Save $3,199 SGD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $6,769 SGD at NZ Jewellers · As of October 18, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241078543. Listed at 16 retailers as of November 4, 2026, with a 132% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241078543
Dimensions6.53 × 7.44 × 4.31 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.53 mm7.44 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241078543
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.9%

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: $3,396 SGD|Low: $2,411 SGD|High: $5,740 SGD|Avg: $3,429 SGD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11$2,427 SGD
Retailer 7$2,837 SGD
Retailer 10$2,971 SGD
Retailer 3$3,018 SGD
Retailer 4$3,123 SGD
Retailer 5$3,364 SGD
Retailer 1$3,396 SGD
Retailer 9$3,399 SGD
Retailer 2$3,627 SGD
Retailer 6$3,929 SGD
Retailer 8$5,626 SGD

44 data points across 11 retailers

16 retailers$2,427 SGD to $5,626 SGD

A
Cheapest Retailer
-
$2,427 SGD
B+
Retailer 2
-
$2,837 SGD
View
B+
Retailer 3
-
$2,971 SGD
View
Final sale: no returns
B+
Retailer 4
-
$3,018 SGD
View
B+
Retailer 5
-
$3,123 SGD
View
Retailer 6
-
$3,239 SGD
View
Price last confirmed 20 days ago
Retailer 7
-
$3,239 SGD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
$3,364 SGD
View
Retailer 9
-
$3,387 SGD
View
Price last confirmed 22 days ago
B+
Retailer 10
-
$3,396 SGD
View
B+
Retailer 11
-
$3,399 SGD
View
Retailer 12
-
$3,627 SGD
View
Price last confirmed 31 days ago
Retailer 13
-
$3,736 SGD
View
Price last confirmed 19 days ago
B+
Retailer 14
-
$3,929 SGD
View
B
Retailer 15
-
$5,626 SGD
View
Most Expensive
NZ Jewellers
b8ff14db-c968-4b36-b67a-db21493df5da · Oct 18
$6,769 SGD
$5,282 USD
View
Price last confirmed 20 days ago
15 more retailers have this diamond
Prices start from $2,427 SGDSave up to $3,199 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
$2,427 SGD