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Heart|Natural|GIA

0.51ct D SI1 Heart Natural Diamond

GD • D/SI1 • GIA 1539219765

Certificate GIA 1539219765

Diamond specifications and retailer prices

From $757 AUD
As of November 6, 2026
Save $352 AUD (32%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,109 AUD at Steven Stone · As of November 7, 2026
View at Steven Stone

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1539219765. Listed at 5 retailers as of November 6, 2026, with prices from $757 to $1,109, a $352 spread on the same certified stone. Steven Stone lists it at $1,109. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1539219765
Dimensions4.90 × 5.68 × 3.18 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Crystal
Top View
4.90 mm5.68 mm0.51 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1539219765
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 55.9%

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: $936 AUD|Low: $681 AUD|High: $1,109 AUD|Avg: $842 AUD|-8.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Steven Stone
November 7, 2026
Retailer 4$757 AUD
Retailer 3$773 AUD
Retailer 2$846 AUD
Retailer 1$936 AUD
Steven Stone$1,109 AUD

42 data points across 5 retailers

5 retailers$757 AUD to $1,109 AUD

A
Cheapest Retailer
-
$757 AUD
A
Retailer 2
-
$773 AUD
View
Final sale: no returns
B+
Retailer 3
-
$846 AUD
View
B+
Retailer 4
-
$936 AUD
View
Most Expensive
B
Steven Stone
333509971 · Nov 7
$1,109 AUD
£600 GBP
View
4 more retailers have this diamond
Prices start from $757 AUDSave up to $352 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
$757 AUD