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Heart|Natural|GIA

0.51ct H SI2 Heart Natural Diamond

GD • H/SI2 • GIA 5556256128

Certificate GIA 5556256128

Diamond specifications and retailer prices

From $534 AUD
As of November 5, 2026
Save $134 AUD (20%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $669 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5556256128. Listed at 2 retailers as of November 5, 2026, with prices from $534 to $669, a $134 spread on the same certified stone. 77 Diamonds lists it at $669. 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
H
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5556256128
Dimensions5.10 × 5.67 × 3.15 mm
L/W Ratio1.11
Top View
5.10 mm5.67 mm0.51 ctH / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5556256128
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 55.5%

Caratlytics Score

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

Last verified: Nov 5
Current: $669 AUD|Low: $534 AUD|High: $688 AUD|Avg: $612 AUD|+2.5%
77 Diamonds
Retailer 2
November 6, 2026
Retailer 2$534 AUD
77 Diamonds$669 AUD

41 data points across 2 retailers

2 retailers$534 AUD to $669 AUD

A
Cheapest Retailer
-
$534 AUD
Most Expensive
B+
77 Diamonds
HSCPJ8DZABKF · Nov 6
$669 AUD
£362 GBP
View
1 more retailer has this diamond
Prices start from $534 AUDSave up to $134 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
$534 AUD