CaratHunter
Plans
Princess|Natural|GIA

0.51ct H SI1 Princess Natural Diamond

GD • H/SI1 • GIA 2566272905

Certificate GIA 2566272905

Diamond specifications and retailer prices

From $489 AUD
As of November 4, 2026
Save $600 AUD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,622 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct natural princess diamond

This 0.51ct natural princess 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 2566272905. Listed at 15 retailers as of November 4, 2026, with a 123% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566272905
Dimensions4.27 × 4.26 × 3.16 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Cloud
Top View
4.27 mm4.26 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566272905
Side View
Table 71.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 74.1%

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 4
Current: $1,622 AUD|Low: $489 AUD|High: $2,691 AUD|Avg: $1,027 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 4$489 AUD
Retailer 2$519 AUD
Retailer 6$857 AUD
Retailer 8$869 AUD
Retailer 11$880 AUD
Retailer 12$889 AUD
Retailer 3$909 AUD
Retailer 5$987 AUD
Retailer 13$993 AUD
Retailer 7$1,050 AUD
Retailer 9$1,089 AUD
MOH London$1,622 AUD
Retailer 10$2,691 AUD

7 data points across 13 retailers

15 retailers$489 AUD to $1,089 AUD

A
Cheapest Retailer
-
$489 AUD
Final sale: no returns
A
Retailer 2
-
$519 AUD
View
B+
Retailer 3
-
$643 AUD
View
B+
Retailer 4
-
$714 AUD
View
B
Retailer 5
-
$857 AUD
View
B
Retailer 6
-
$869 AUD
View
B
Retailer 7
-
$880 AUD
View
B
Retailer 8
-
$889 AUD
View
B
Retailer 9
-
$909 AUD
View
B
Retailer 10
-
$987 AUD
View
B
Retailer 11
-
$993 AUD
View
B
Retailer 12
-
$1,050 AUD
View
B
Retailer 13
-
$1,089 AUD
View
Most Expensive
MOH London
65D48ADDD · Nov 2
$1,622 AUD
£894 GBP
View
Price under review
13 more retailers have this diamond
Prices start from $489 AUDSave up to $600 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 Princess
$489 AUD