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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 5293326024

Certificate GIA 5293326024

Diamond specifications and retailer prices

From £403 GBP
As of November 4, 2026
Save £461 GBP (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,435 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5293326024. Listed at 10 retailers as of November 2, 2026, with a 114% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5293326024
Dimensions5.13 × 5.11 × 3.17 mm
L/W Ratio1.00
Top View
5.13 mm5.11 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5293326024
Side View
Table 56.0%CrownGirdle: Sli. ThickPavilionCulet: NoneDepth 62.0%

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: £1,435 GBP|Low: £339 GBP|High: £1,435 GBP|Avg: £574 GBP|+1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3£339 GBP
Retailer 8£403 GBP
Retailer 9£403 GBP
Retailer 11£428 GBP
Retailer 7£432 GBP
Retailer 2£444 GBP
Retailer 4£461 GBP
Retailer 10£472 GBP
Retailer 5£559 GBP
Retailer 6£864 GBP
NZ Jewellers£1,435 GBP

33 data points across 11 retailers

10 retailers£403 GBP to £864 GBP

A
Cheapest Retailer
-
£403 GBP
Retailer 2
-
£403 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£428 GBP
View
Retailer 4
-
£432 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
-
£444 GBP
View
A
Retailer 6
-
£461 GBP
View
A
Retailer 7
-
£472 GBP
View
B+
Retailer 8
-
£559 GBP
View
B
Retailer 9
-
£864 GBP
View
Most Expensive
NZ Jewellers
f58859dc-206d-428f-ac7e-8eb1f0cd5ad1 · Oct 27
£1,435 GBP
$1,932 USD
View
Price last confirmed 10 days ago
9 more retailers have this diamond
Prices start from £403 GBPSave up to £461 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 Round
£403 GBP