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Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 2145498543

Certificate GIA 2145498543

Diamond specifications and retailer prices

From $5,137 SGD
As of November 6, 2026
Save $5,197 SGD (50%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $10,334 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2145498543. Listed at 13 retailers as of November 4, 2026, with prices from $5,137 to $10,334, a $5,197 spread on the same certified stone. MOH London lists it at $10,334. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2145498543
Dimensions6.59 × 5.54 × 3.75 mm
L/W Ratio1.19
Culet sizeNone
Top View
6.59 mm5.54 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 2145498543
Side View
Table 68.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $10,334 SGD|Low: $5,011 SGD|High: $10,985 SGD|Avg: $6,724 SGD|-1.3%
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
Retailer 14
November 6, 2026
Retailer 5$5,137 SGD
Retailer 14$5,140 SGD
Retailer 3$5,179 SGD
Retailer 10$5,248 SGD
Retailer 9$5,569 SGD
Retailer 12$5,894 SGD
Retailer 7$6,405 SGD
Retailer 6$6,705 SGD
Retailer 11$6,732 SGD
Retailer 4$7,182 SGD
Retailer 2$7,318 SGD
Retailer 8$7,937 SGD
Retailer 13$9,416 SGD
MOH London$10,334 SGD

27 data points across 14 retailers

13 retailers$5,137 SGD to $10,334 SGD

B+
Cheapest Retailer
-
$5,137 SGD
B+
Retailer 2
-
$5,140 SGD
View
B+
Retailer 3
-
$5,179 SGD
View
Final sale: no returns
Retailer 4
-
$5,248 SGD
View
Price last confirmed 9 days ago
B
Retailer 5
-
$5,569 SGD
View
Retailer 6
-
$5,894 SGD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$6,405 SGD
View
B
Retailer 8
-
$6,732 SGD
View
Retailer 9
-
$7,182 SGD
View
Price last confirmed 14 days ago
B
Retailer 10
-
$7,318 SGD
View
B
Retailer 11
-
$7,937 SGD
View
B
Retailer 12
-
$9,416 SGD
View
Most Expensive
B
MOH London
D254C7E99 · Nov 4
$10,334 SGD
£6,349 GBP
View
12 more retailers have this diamond
Prices start from $5,137 SGDSave up to $5,197 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.

B+
1.21ct Heart
$5,137 SGD