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Princess|Natural|GIA

0.51ct I SI1 Princess Natural Diamond

ID • I/SI1 • GIA 1328318877

Certificate GIA 1328318877

Diamond specifications and retailer prices

From $652 AUD
As of November 6, 2026
Save $552 AUD (46%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,802 AUD at MOH London · As of November 1, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1328318877. Listed at 17 retailers as of November 4, 2026, with a 85% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1328318877
Dimensions4.52 × 4.31 × 3.15 mm
L/W Ratio1.05
Key to symbols
Crystal, Feather
Top View
4.52 mm4.31 mm0.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1328318877
Side View
Table 74.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 73.1%

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 6
Current: $1,802 AUD|Low: $652 AUD|High: $2,448 AUD|Avg: $1,019 AUD|-0.6%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 9$652 AUD
Retailer 7$696 AUD
Retailer 8$699 AUD
Retailer 4$719 AUD
Retailer 18$780 AUD
Retailer 11$814 AUD
Retailer 15$841 AUD
Retailer 16$841 AUD
Retailer 10$867 AUD
Retailer 3$901 AUD
Retailer 2$952 AUD
Retailer 13$969 AUD
Retailer 5$985 AUD
Retailer 6$1,070 AUD
Retailer 12$1,156 AUD
Retailer 14$1,204 AUD
MOH London$1,802 AUD
Retailer 17$2,448 AUD

30 data points across 18 retailers

17 retailers$652 AUD to $1,204 AUD

A
Cheapest Retailer
-
$652 AUD
A
Retailer 2
-
$699 AUD
View
B+
Retailer 3
-
$719 AUD
View
Final sale: no returns
B+
Retailer 4
-
$780 AUD
View
B+
Retailer 5
-
$814 AUD
View
Retailer 6
-
$841 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$841 AUD
View
B
Retailer 8
-
$901 AUD
View
B+
Retailer 9
-
$952 AUD
View
B
Retailer 10
-
$969 AUD
View
B
Retailer 11
-
$971 AUD
View
B
Retailer 12
-
$985 AUD
View
B
Retailer 13
-
$1,070 AUD
View
B
Retailer 14
-
$1,156 AUD
View
B
Retailer 15
-
$1,204 AUD
View
Most Expensive
MOH London
A33FE9304 · Nov 1
$1,802 AUD
£975 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $652 AUDSave up to $552 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
$652 AUD