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Heart|Natural|GIA

0.51ct H SI1 Heart Natural Diamond

GD • H/SI1 • GIA 6525215528

Certificate GIA 6525215528

Diamond specifications and retailer prices

From $563 AUD
As of November 6, 2026
Save $156 AUD (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $720 AUD at 77 Diamonds · As of November 7, 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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6525215528. Listed at 4 retailers as of November 6, 2026, with prices from $563 to $720, a $156 spread on the same certified stone. 77 Diamonds lists it at $720. 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 6525215528
Dimensions4.81 × 5.67 × 3.35 mm
L/W Ratio1.18
Top View
4.81 mm5.67 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6525215528
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $720 AUD|Low: $534 AUD|High: $820 AUD|Avg: $646 AUD|-10.6%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 7, 2026
Retailer 2$563 AUD
Retailer 3$585 AUD
Retailer 4$629 AUD
77 Diamonds$720 AUD

42 data points across 4 retailers

4 retailers$563 AUD to $720 AUD

A
Cheapest Retailer
-
$563 AUD
A
Retailer 2
-
$585 AUD
View
Final sale: no returns
B+
Retailer 3
-
$629 AUD
View
Most Expensive
B+
77 Diamonds
HSCPHRRPCQMU · Nov 7
$720 AUD
£389 GBP
View
3 more retailers have this diamond
Prices start from $563 AUDSave up to $156 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
$563 AUD