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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 $662 NZD
As of November 5, 2026
Save $167 NZD (20%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $829 NZD 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 $662 to $829, a $167 spread on the same certified stone. 77 Diamonds lists it at $829. 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

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $829 NZD|Low: $662 NZD|High: $853 NZD|Avg: $758 NZD|+2.4%
77 Diamonds
Retailer 2
November 6, 2026
Retailer 2$662 NZD
77 Diamonds$829 NZD

40 data points across 2 retailers

2 retailers$662 NZD to $829 NZD

A
Cheapest Retailer
-
$662 NZD
Most Expensive
B+
77 Diamonds
HSCPJ8DZABKF · Nov 6
$829 NZD
£362 GBP
View
1 more retailer has this diamond
Prices start from $662 NZDSave up to $167 NZD

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
$662 NZD