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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 $3,951 NZD
As of November 6, 2026
Save $759 NZD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $4,710 NZD 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 $3,951 to $4,710, a $759 spread on the same certified stone. Blue Nile lists it at $4,710. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,710 NZD|Low: $3,783 NZD|High: $5,735 NZD|Avg: $4,480 NZD|-17.9%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$3,951 NZD
Retailer 3$3,969 NZD
Retailer 6$4,015 NZD
Retailer 2$4,210 NZD
Retailer 5$4,535 NZD
Blue Nile$4,710 NZD

41 data points across 6 retailers

6 retailers$3,951 NZD to $4,710 NZD

A
Cheapest Retailer
-
$3,951 NZD
A
Retailer 2
-
$3,969 NZD
View
Final sale: no returns
A
Retailer 3
-
$4,015 NZD
View
A
Retailer 4
-
$4,210 NZD
View
B+
Retailer 5
-
$4,535 NZD
View
Most Expensive
B+
Blue Nile
29182291 · Nov 5
$4,710 NZD
$2,611 USD
View
5 more retailers have this diamond
Prices start from $3,951 NZDSave up to $759 NZD

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
$3,951 NZD