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Heart|Natural|GIA

0.51ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 7536277818

Certificate GIA 7536277818

Diamond specifications and retailer prices

From $779 AUD
As of November 6, 2026
Save $268 AUD (26%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,047 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded D 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 7536277818. Listed at 4 retailers as of November 6, 2026, with prices from $779 to $1,047, a $268 spread on the same certified stone. 77 Diamonds lists it at $1,047. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7536277818
Dimensions4.98 × 5.75 × 3.16 mm
L/W Ratio1.15
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
4.98 mm5.75 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7536277818
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 55.0%

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: $1,047 AUD|Low: $672 AUD|High: $1,062 AUD|Avg: $865 AUD|+5.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5$745 AUD
Retailer 2$779 AUD
Retailer 4$835 AUD
Retailer 3$946 AUD
77 Diamonds$1,047 AUD

35 data points across 5 retailers

4 retailers$779 AUD to $1,047 AUD

A
Cheapest Retailer
-
$779 AUD
Final sale: no returns
Retailer 2
-
$835 AUD
View
Price last confirmed 12 days ago
Retailer 3
-
$946 AUD
View
Price last confirmed 13 days ago
Most Expensive
B+
77 Diamonds
HSCPZHY4HKVJ · Nov 6
$1,047 AUD
£566 GBP
View
3 more retailers have this diamond
Prices start from $779 AUDSave up to $268 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
$779 AUD