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Princess|Natural|GIA

0.51ct D SI1 Princess Natural Diamond

GD • D/SI1 • GIA 3555417172

Certificate GIA 3555417172

Diamond specifications and retailer prices

From £378 GBP
As of November 4, 2026
Save £115 GBP (23%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £493 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.51ct natural princess diamond

This 0.51ct natural princess sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 3555417172. Listed at 6 retailers as of November 4, 2026, with prices from £378 to £493, a £115 spread on the same certified stone. Blue Nile lists it at £493. 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
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555417172
Dimensions4.47 × 4.42 × 3.19 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
4.47 mm4.42 mm0.51 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3555417172
Side View
Table 71.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 72.3%

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: £493 GBP|Low: £343 GBP|High: £535 GBP|Avg: £429 GBP|-7.8%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£378 GBP
Retailer 4£386 GBP
Retailer 3£390 GBP
Retailer 5£423 GBP
Retailer 2£465 GBP
Blue Nile£493 GBP

42 data points across 6 retailers

6 retailers£378 GBP to £493 GBP

A
Cheapest Retailer
-
£378 GBP
B+
Retailer 2
-
£386 GBP
View
Final sale: no returns
A
Retailer 3
-
£390 GBP
View
B+
Retailer 4
-
£423 GBP
View
B+
Retailer 5
-
£465 GBP
View
Most Expensive
B+
Blue Nile
29297361 · Nov 5
£493 GBP
$664 USD
View
5 more retailers have this diamond
Prices start from £378 GBPSave up to £115 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
£378 GBP