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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 7388356202

Certificate GIA 7388356202

Diamond specifications and retailer prices

From £334 GBP
As of November 4, 2026
Save £500 GBP (60%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,388 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 7388356202. Listed at 10 retailers as of November 4, 2026, with a 150% 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
FluorescenceMedium
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7388356202
Dimensions5.11 × 5.10 × 3.16 mm
L/W Ratio1.00
Top View
5.11 mm5.10 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7388356202
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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: £1,388 GBP|Low: £279 GBP|High: £1,388 GBP|Avg: £585 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£334 GBP
Retailer 4£368 GBP
Retailer 8£390 GBP
Retailer 9£400 GBP
Retailer 6£418 GBP
Retailer 2£443 GBP
Retailer 3£540 GBP
Retailer 5£834 GBP
NZ Jewellers£1,388 GBP

44 data points across 9 retailers

10 retailers£334 GBP to £834 GBP

A
Cheapest Retailer
-
£334 GBP
Final sale: no returns
A
Retailer 2
-
£368 GBP
View
Retailer 3
-
£390 GBP
View
Price last confirmed 8 days ago
A
Retailer 4
-
£390 GBP
View
A
Retailer 5
-
£418 GBP
View
Retailer 6
-
£418 GBP
View
Price last confirmed 10 days ago
A
Retailer 7
-
£443 GBP
View
B+
Retailer 8
-
£540 GBP
View
B
Retailer 9
-
£834 GBP
View
Most Expensive
NZ Jewellers
b5cc16ca-40b4-43ec-8b14-3fefe3aec87c · Oct 27
£1,388 GBP
$1,868 USD
View
Price last confirmed 10 days ago
9 more retailers have this diamond
Prices start from £334 GBPSave up to £500 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
£334 GBP