Round|Natural|GIA

0.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1553573912

Certificate GIA 1553573912

Diamond specifications and retailer prices

From £270 GBP
As of November 6, 2026
Save £573 GBP (68%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,406 GBP at NZ Jewellers · As of November 4, 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 1553573912. Listed at 19 retailers as of November 4, 2026, with a 212% 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 angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1553573912
Dimensions5.06 × 5.03 × 3.20 mm
L/W Ratio1.01
Top View
5.06 mm5.03 mm0.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553573912
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NDepth 63.4%

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: £1,406 GBP|Low: £270 GBP|High: £1,425 GBP|Avg: £513 GBP|-1.4%
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 10£270 GBP
Retailer 7£314 GBP
Retailer 16£367 GBP
Retailer 8£392 GBP
Retailer 5£393 GBP
Retailer 9£400 GBP
Retailer 13£424 GBP
Retailer 15£450 GBP
Retailer 12£464 GBP
Retailer 11£472 GBP
Retailer 14£496 GBP
Retailer 6£503 GBP
Retailer 2£507 GBP
Retailer 4£516 GBP
Retailer 17£566 GBP
Retailer 3£843 GBP
NZ Jewellers£1,406 GBP

21 data points across 17 retailers

19 retailers£270 GBP to £843 GBP

A
Cheapest Retailer
-
£270 GBP
A
Retailer 2
-
£314 GBP
View
Retailer 3
-
£319 GBP
View
Price last confirmed 13 days ago
A
Retailer 4
-
£367 GBP
View
Retailer 5
-
£392 GBP
View
Price last confirmed 10 days ago
A
Retailer 6
-
£393 GBP
View
Retailer 7
-
£400 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£424 GBP
View
B+
Retailer 9
-
£450 GBP
View
B+
Retailer 10
-
£464 GBP
View
B+
Retailer 11
-
£472 GBP
View
B+
Retailer 12
-
£496 GBP
View
B
Retailer 13
-
£503 GBP
View
B+
Retailer 14
-
£507 GBP
View
B
Retailer 15
-
£516 GBP
View
Retailer 16
-
£564 GBP
View
Price last confirmed 34 days ago
B+
Retailer 17
-
£566 GBP
View
B
Retailer 18
-
£843 GBP
View
Most Expensive
NZ Jewellers
adcef4de-dd2a-4de0-8e03-3f099f5bc2ce · Nov 4
£1,406 GBP
$1,892 USD
View
Price under review
18 more retailers have this diamond
Prices start from £270 GBPSave up to £573 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
£270 GBP