Round|Natural|GIA

0.50ct I SI1 Round Natural Diamond

ID • I/SI1 • GIA 029

Certificate GIA 029

Diamond specifications and retailer prices

From £291 GBP
As of November 6, 2026
Save £945 GBP (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,236 GBP at NZ Jewellers · As of October 26, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 17 retailers as of November 4, 2026, with a 325% 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 029
Dimensions5.13 × 5.14 × 3.14 mm
L/W Ratio1.00
Top View
5.13 mm5.14 mm0.50 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 029
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.9%

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 6
Current: £1,236 GBP|Low: £279 GBP|High: £1,258 GBP|Avg: £507 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 2£291 GBP
Retailer 12£333 GBP
Retailer 13£337 GBP
Retailer 3£363 GBP
Retailer 9£394 GBP
Retailer 6£414 GBP
Retailer 8£424 GBP
Retailer 7£455 GBP
Retailer 11£530 GBP
Retailer 10£547 GBP
Retailer 4£659 GBP
Retailer 5£693 GBP
NZ Jewellers£1,236 GBP

18 data points across 13 retailers

17 retailers£291 GBP to £1,236 GBP

A
Cheapest Retailer
-
£291 GBP
A
Retailer 2
-
£333 GBP
View
A
Retailer 3
-
£337 GBP
View
A
Retailer 4
-
£363 GBP
View
Final sale: no returns
A
Retailer 5
-
£394 GBP
View
Retailer 6
-
£394 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
£414 GBP
View
A
Retailer 8
-
£424 GBP
View
Retailer 9
-
£424 GBP
View
Price last confirmed 12 days ago
A
Retailer 10
-
£455 GBP
View
Retailer 11
-
£455 GBP
View
Price last confirmed 10 days ago
B+
Retailer 12
-
£530 GBP
View
Retailer 13
-
£547 GBP
View
Price last confirmed 11 days ago
Retailer 14
-
£659 GBP
View
Price last confirmed 16 days ago
B+
Retailer 15
-
£693 GBP
View
B
Retailer 16
-
£1,236 GBP
View
Most Expensive
NZ Jewellers
f485ba37-cdda-491a-a342-b36c0c4ed4cc · Oct 26
£1,236 GBP
$1,663 USD
View
Price last confirmed 10 days ago
16 more retailers have this diamond
Prices start from £291 GBPSave up to £945 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
£291 GBP