Princess|Natural|GIA

0.51ct I SI1 Princess Natural Diamond

ID • I/SI1 • GIA 1328318877

Certificate GIA 1328318877

Diamond specifications and retailer prices

From $448 USD
As of November 6, 2026
Save $379 USD (46%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,238 USD 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
Color
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: $1,238 USD|Low: $448 USD|High: $1,682 USD|Avg: $700 USD|-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$448 USD
Retailer 7$478 USD
Retailer 8$480 USD
Retailer 4$494 USD
Retailer 18$536 USD
Retailer 11$559 USD
Retailer 15$578 USD
Retailer 16$578 USD
Retailer 10$596 USD
Retailer 3$619 USD
Retailer 2$654 USD
Retailer 13$666 USD
Retailer 5$677 USD
Retailer 6$735 USD
Retailer 12$794 USD
Retailer 14$827 USD
MOH London$1,238 USD
Retailer 17$1,682 USD

30 data points across 18 retailers

17 retailers$448 USD to $827 USD

A
Cheapest Retailer
-
$448 USD
A
Retailer 2
-
$480 USD
View
B+
Retailer 3
-
$494 USD
View
Final sale: no returns
B+
Retailer 4
-
$536 USD
View
B+
Retailer 5
-
$559 USD
View
Retailer 6
-
$578 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$578 USD
View
B
Retailer 8
-
$619 USD
View
B+
Retailer 9
-
$654 USD
View
B
Retailer 10
-
$666 USD
View
B
Retailer 11
-
$667 USD
View
B
Retailer 12
-
$677 USD
View
B
Retailer 13
-
$735 USD
View
B
Retailer 14
-
$794 USD
View
B
Retailer 15
-
$827 USD
View
Most Expensive
MOH London
A33FE9304 · Nov 1
$1,238 USD
£975 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $448 USDSave up to $379 USD

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
$448 USD