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Round|Natural|GIA

0.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1559976651

Certificate GIA 1559976651

Diamond specifications and retailer prices

From £295 GBP
As of November 6, 2026
Save £603 GBP (67%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,283 GBP at NZ Jewellers · As of September 5, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559976651. Listed at 22 retailers as of November 2, 2026, with a 205% 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1559976651
Dimensions5.08 × 5.05 × 3.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
5.08 mm5.05 mm0.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559976651
Side View
Table 56.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NDepth 62.4%

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: £1,230 GBP|Low: £295 GBP|High: £1,325 GBP|Avg: £524 GBP|-7.2%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 2£295 GBP
Retailer 3£341 GBP
Retailer 4£342 GBP
Retailer 13£358 GBP
Retailer 6£392 GBP
Retailer 5£422 GBP
Retailer 8£423 GBP
Retailer 9£452 GBP
Retailer 10£480 GBP
Retailer 14£481 GBP
Retailer 15£510 GBP
Retailer 7£539 GBP
Retailer 12£541 GBP
Retailer 16£544 GBP
Retailer 11£603 GBP
Retailer 17£898 GBP
NZ Jewellers£1,230 GBP

28 data points across 17 retailers

22 retailers£295 GBP to £898 GBP

A
Cheapest Retailer
-
£295 GBP
A
Retailer 2
-
£341 GBP
View
A
Retailer 3
-
£342 GBP
View
A
Retailer 4
-
£358 GBP
View
Final sale: no returns
Retailer 5
-
£392 GBP
View
Price last confirmed 15 days ago
Retailer 6
-
£409 GBP
View
Price last confirmed 62 days ago
Retailer 7
-
£422 GBP
View
Price last confirmed 15 days ago
Retailer 8
-
£423 GBP
View
Price last confirmed 11 days ago
Retailer 9
-
£441 GBP
View
Price last confirmed 22 days ago
Retailer 10
-
£452 GBP
View
Price last confirmed 14 days ago
Retailer 11
-
£472 GBP
View
Price last confirmed 60 days ago
B+
Retailer 12
-
£480 GBP
View
B+
Retailer 13
-
£481 GBP
View
B+
Retailer 14
-
£510 GBP
View
B
Retailer 15
-
£539 GBP
View
B
Retailer 16
-
£541 GBP
View
B
Retailer 17
-
£544 GBP
View
B
Retailer 18
-
£603 GBP
View
Retailer 19
-
£640 GBP
View
Price last confirmed 33 days ago
B
Retailer 20
-
£898 GBP
View
Retailer 21
-
£1,230 GBP
View
Price last confirmed 14 days ago
Most Expensive
NZ Jewellers
c0e33174-c76c-4a9c-a336-f0e9114aaca6 · Sep 5
£1,283 GBP
$1,727 USD
View
Price last confirmed 61 days ago
21 more retailers have this diamond
Prices start from £295 GBPSave up to £603 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
£295 GBP