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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 $3,187 AUD
As of November 6, 2026
Save $613 AUD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,800 AUD 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 $3,187 to $3,800, a $613 spread on the same certified stone. Blue Nile lists it at $3,800. 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: $3,800 AUD|Low: $3,052 AUD|High: $4,627 AUD|Avg: $3,614 AUD|-17.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$3,187 AUD
Retailer 3$3,202 AUD
Retailer 6$3,240 AUD
Retailer 2$3,397 AUD
Retailer 5$3,659 AUD
Blue Nile$3,800 AUD

41 data points across 6 retailers

6 retailers$3,187 AUD to $3,800 AUD

A
Cheapest Retailer
-
$3,187 AUD
A
Retailer 2
-
$3,202 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,240 AUD
View
A
Retailer 4
-
$3,397 AUD
View
B+
Retailer 5
-
$3,659 AUD
View
Most Expensive
B+
Blue Nile
29182291 · Nov 5
$3,800 AUD
$2,611 USD
View
5 more retailers have this diamond
Prices start from $3,187 AUDSave up to $613 AUD

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
$3,187 AUD