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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 £335 GBP
As of November 6, 2026
Save £283 GBP (46%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £925 GBP 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: £925 GBP|Low: £335 GBP|High: £1,257 GBP|Avg: £523 GBP|-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£335 GBP
Retailer 7£357 GBP
Retailer 8£359 GBP
Retailer 4£369 GBP
Retailer 18£400 GBP
Retailer 11£418 GBP
Retailer 15£432 GBP
Retailer 16£432 GBP
Retailer 10£445 GBP
Retailer 3£462 GBP
Retailer 2£489 GBP
Retailer 13£498 GBP
Retailer 5£506 GBP
Retailer 6£549 GBP
Retailer 12£593 GBP
Retailer 14£618 GBP
MOH London£925 GBP
Retailer 17£1,257 GBP

30 data points across 18 retailers

17 retailers£335 GBP to £618 GBP

A
Cheapest Retailer
-
£335 GBP
A
Retailer 2
-
£359 GBP
View
B+
Retailer 3
-
£369 GBP
View
Final sale: no returns
B+
Retailer 4
-
£400 GBP
View
B+
Retailer 5
-
£418 GBP
View
Retailer 6
-
£432 GBP
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£432 GBP
View
B
Retailer 8
-
£462 GBP
View
B+
Retailer 9
-
£489 GBP
View
B
Retailer 10
-
£498 GBP
View
B
Retailer 11
-
£498 GBP
View
B
Retailer 12
-
£506 GBP
View
B
Retailer 13
-
£549 GBP
View
B
Retailer 14
-
£593 GBP
View
B
Retailer 15
-
£618 GBP
View
Most Expensive
MOH London
A33FE9304 · Nov 1
£925 GBP
View
Price under review
15 more retailers have this diamond
Prices start from £335 GBPSave up to £283 GBP

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
£335 GBP