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Heart|Natural|GIA

1.21ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 1553316223

Certificate GIA 1553316223

Diamond specifications and retailer prices

From $2,807 SGD
As of November 6, 2026
Save $540 SGD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,346 SGD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded F 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 1553316223. Listed at 6 retailers as of November 5, 2026, with prices from $2,807 to $3,346, a $540 spread on the same certified stone. Blue Nile lists it at $3,346. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553316223
Dimensions6.68 × 7.29 × 4.34 mm
L/W Ratio1.09
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural, Natural
Top View
6.68 mm7.29 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1553316223
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 59.6%

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: $3,346 SGD|Low: $2,688 SGD|High: $4,074 SGD|Avg: $3,183 SGD|-17.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$2,807 SGD
Retailer 3$2,820 SGD
Retailer 6$2,853 SGD
Retailer 2$2,991 SGD
Retailer 5$3,222 SGD
Blue Nile$3,346 SGD

41 data points across 6 retailers

6 retailers$2,807 SGD to $3,346 SGD

A
Cheapest Retailer
-
$2,807 SGD
A
Retailer 2
-
$2,820 SGD
View
Final sale: no returns
A
Retailer 3
-
$2,853 SGD
View
A
Retailer 4
-
$2,991 SGD
View
B+
Retailer 5
-
$3,222 SGD
View
Most Expensive
B+
Blue Nile
29182291 · Nov 5
$3,346 SGD
$2,611 USD
View
5 more retailers have this diamond
Prices start from $2,807 SGDSave up to $540 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
$2,807 SGD