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Round|Natural|GIA

0.50ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 2427521846

Certificate GIA 2427521846

Diamond specifications and retailer prices

From £174 GBP
As of November 5, 2026
Save £224 GBP (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £916 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.5ct natural round diamond

This 0.5ct natural round sits in the half to three-quarter carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2427521846. Listed at 8 retailers as of November 5, 2026, with a 129% 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

0.50
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2427521846
Dimensions5.04 × 5.08 × 3.20 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
5.04 mm5.08 mm0.50 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2427521846
Side View
Table 58.0%Crown 34.5°Girdle: STK-STKPavilion 41.8°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £398 GBP|Low: £174 GBP|High: £444 GBP|Avg: £276 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 2£174 GBP
Retailer 5£209 GBP
Retailer 4£258 GBP
Retailer 3£331 GBP
Retailer 1£398 GBP

45 data points across 5 retailers

8 retailers£174 GBP to £398 GBP

A
Cheapest Retailer
-
£174 GBP
B+
Retailer 2
-
£209 GBP
View
Retailer 3
-
£239 GBP
View
Price last confirmed 36 days ago
Retailer 4
-
£267 GBP
View
Price last confirmed 38 days ago
Retailer 5
-
£322 GBP
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£331 GBP
View
B
Retailer 7
-
£398 GBP
View
Most Expensive
NZ Jewellers
315668e2-20c6-4b9f-9f67-eab3941e6d00 · Sep 28
£916 GBP
$1,233 USD
View
Price last confirmed 39 days ago
7 more retailers have this diamond
Prices start from £174 GBPSave up to £224 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
0.50ct Round
£174 GBP