CaratHunter
Plans
Heart|Natural|GIA

0.51ct H SI1 Heart Natural Diamond

GD • H/SI1 • GIA 5526639559

Certificate GIA 5526639559

Diamond specifications and retailer prices

From $720 NZD
As of November 6, 2026
Save $229 NZD (24%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $949 NZD at Blue Nile · As of November 5, 2026
View at Blue Nile

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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5526639559. Listed at 4 retailers as of November 5, 2026, with prices from $720 to $949, a $229 spread on the same certified stone. Blue Nile lists it at $949. 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
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5526639559
Dimensions4.71 × 5.53 × 3.32 mm
L/W Ratio1.17
Top View
4.71 mm5.53 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5526639559
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 60.0%

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: $949 NZD|Low: $657 NZD|High: $1,095 NZD|Avg: $814 NZD|-13.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 5$669 NZD
Retailer 3$720 NZD
Retailer 4$774 NZD
Retailer 2$884 NZD
Blue Nile$949 NZD

42 data points across 5 retailers

4 retailers$720 NZD to $949 NZD

A
Cheapest Retailer
-
$720 NZD
Final sale: no returns
A
Retailer 2
-
$774 NZD
View
B+
Retailer 3
-
$884 NZD
View
Most Expensive
B+
Blue Nile
25597981 · Nov 5
$949 NZD
$526 USD
View
3 more retailers have this diamond
Prices start from $720 NZDSave up to $229 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
$720 NZD