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Heart|Natural|GIA

0.55ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 6551318492

Certificate GIA 6551318492

Diamond specifications and retailer prices

From $702 AUD
As of November 6, 2026
Save $202 AUD (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $904 AUD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.55ct natural heart diamond

This 0.55ct natural heart sits in the half to three-quarter 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 6551318492. Listed at 4 retailers as of November 5, 2026, with prices from $702 to $904, a $202 spread on the same certified stone. Blue Nile lists it at $904. 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

0.55
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551318492
Dimensions4.97 × 5.79 × 3.41 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
4.97 mm5.79 mm0.55 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551318492
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $904 AUD|Low: $616 AUD|High: $982 AUD|Avg: $814 AUD|-8.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 7, 2026
Retailer 3$702 AUD
Retailer 4$766 AUD
Retailer 2$873 AUD
Blue Nile$904 AUD

42 data points across 4 retailers

4 retailers$702 AUD to $904 AUD

A
Cheapest Retailer
-
$702 AUD
Final sale: no returns
A
Retailer 2
-
$766 AUD
View
B+
Retailer 3
-
$873 AUD
View
Most Expensive
B+
Blue Nile
29212920 · Nov 5
$904 AUD
$621 USD
View
3 more retailers have this diamond
Prices start from $702 AUDSave up to $202 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
0.55ct Heart
$702 AUD