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Princess|Natural|GIA

0.51ct K SI1 Princess Natural Diamond

GD • K/SI1 • GIA 2566275987

Certificate GIA 2566275987

Diamond specifications and retailer prices

From £250 GBP
As of November 4, 2026
Save £90 GBP (26%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £340 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.51ct natural princess diamond

This 0.51ct natural princess sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2566275987. Listed at 2 retailers as of November 2, 2026, with prices from £250 to £340, a £90 spread on the same certified stone. 77 Diamonds lists it at £340. 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
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2566275987
Dimensions4.47 × 4.39 × 2.97 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Cloud
Top View
4.47 mm4.39 mm0.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2566275987
Side View
Table 71.0%CrownGirdle: MED-VTKPavilionCuletDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 4
Current: £340 GBP|Low: £250 GBP|High: £340 GBP|Avg: £296 GBP|+3.0%
77 Diamonds
Retailer 2
November 4, 2026
Retailer 2£250 GBP
77 Diamonds£340 GBP

37 data points across 2 retailers

2 retailers£250 GBP to £340 GBP

B+
Cheapest Retailer
-
£250 GBP
Most Expensive
B
77 Diamonds
PRICPPBCPJEGK · Nov 2
£340 GBP
View
1 more retailer has this diamond
Prices start from £250 GBPSave up to £90 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.

B+
0.51ct Princess
£250 GBP