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Heart|Natural|GIA

0.51ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 6532618685

Certificate GIA 6532618685

Diamond specifications and retailer prices

From $656 AUD
As of November 6, 2026
Save $202 AUD (24%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $859 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 0.51ct natural heart diamond

This 0.51ct 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 6532618685. Listed at 5 retailers as of November 6, 2026, with prices from $656 to $859, a $202 spread on the same certified stone. Brilliant Earth lists it at $859. 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

0.51
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6532618685
Dimensions5.68 × 4.83 × 3.36 mm
L/W Ratio1.18
Top View
5.68 mm4.83 mm0.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6532618685
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.2%

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: $859 AUD|Low: $608 AUD|High: $961 AUD|Avg: $774 AUD|-10.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3$656 AUD
Retailer 4$675 AUD
Retailer 5$735 AUD
Retailer 2$840 AUD
Brilliant Earth$859 AUD

41 data points across 5 retailers

5 retailers$656 AUD to $859 AUD

A
Cheapest Retailer
-
$656 AUD
A
Retailer 2
-
$675 AUD
View
Final sale: no returns
A
Retailer 3
-
$735 AUD
View
B+
Retailer 4
-
$840 AUD
View
Most Expensive
B+
Brilliant Earth
16020128A · Nov 6
$859 AUD
$590 USD
View
4 more retailers have this diamond
Prices start from $656 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
0.51ct Heart
$656 AUD