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Radiant|Natural|GIA

0.51ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 24

Certificate GIA 24

Diamond specifications and retailer prices

From £642 GBP
As of November 4, 2026
Save £1,226 GBP (66%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,868 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 6 retailers as of November 4, 2026, with prices from £642 to £1,868, a £1,226 spread on the same certified stone. NZ Jewellers lists it at £1,868. 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
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 24
Dimensions5.53 × 4.09 × 2.72 mm
L/W Ratio1.35
Top View
5.53 mm4.09 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 24
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,868 GBP|Low: £642 GBP|High: £1,868 GBP|Avg: £920 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
September 29, 2026
Retailer 6£642 GBP
Retailer 3£694 GBP
Retailer 4£694 GBP
Retailer 2£720 GBP
Retailer 5£800 GBP
NZ Jewellers£1,868 GBP

2 data points across 6 retailers

6 retailers£642 GBP to £1,868 GBP

B+
Cheapest Retailer
-
£642 GBP
B+
Retailer 2
-
£694 GBP
View
B+
Retailer 3
-
£694 GBP
View
B+
Retailer 4
-
£720 GBP
View
B+
Retailer 5
-
£800 GBP
View
Most Expensive
B
NZ Jewellers
dd3608a3-9e7c-47fe-a751-6fb9485f1927 · Nov 5
£1,868 GBP
$2,500 USD
View
5 more retailers have this diamond
Prices start from £642 GBPSave up to £1,226 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 Radiant
£642 GBP