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Round|Natural|GIA

0.50ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1555704351

Certificate GIA 1555704351

Diamond specifications and retailer prices

From £276 GBP
As of November 6, 2026
Save £925 GBP (77%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,258 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555704351. Listed at 24 retailers as of November 4, 2026, with a 335% 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1555704351
Dimensions5.09 × 5.12 × 3.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
5.09 mm5.12 mm0.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555704351
Side View
Table 57.0%Crown 34.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 61.6%

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: £1,201 GBP|Low: £276 GBP|High: £1,201 GBP|Avg: £518 GBP
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
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 6, 2026
Retailer 13£276 GBP
Retailer 9£323 GBP
Retailer 8£346 GBP
Retailer 5£353 GBP
Retailer 12£353 GBP
Retailer 10£383 GBP
Retailer 14£389 GBP
Retailer 17£396 GBP
Retailer 4£410 GBP
Retailer 11£412 GBP
Retailer 3£434 GBP
Retailer 18£468 GBP
Retailer 21£481 GBP
Retailer 15£484 GBP
Retailer 19£510 GBP
Retailer 2£520 GBP
Retailer 7£520 GBP
Retailer 16£532 GBP
Retailer 6£885 GBP
Retailer 20£1,073 GBP
NZ Jewellers£1,201 GBP

21 data points across 21 retailers

24 retailers£276 GBP to £1,201 GBP

A
Cheapest Retailer
-
£276 GBP
A
Retailer 2
-
£323 GBP
View
A
Retailer 3
-
£346 GBP
View
A
Retailer 4
-
£353 GBP
View
A
Retailer 5
-
£353 GBP
View
Final sale: no returns
A
Retailer 6
-
£383 GBP
View
Retailer 7
-
£389 GBP
View
Price last confirmed 19 days ago
A
Retailer 8
-
£396 GBP
View
Retailer 9
-
£401 GBP
View
Price last confirmed 62 days ago
A
Retailer 10
-
£410 GBP
View
A
Retailer 11
-
£412 GBP
View
A
Retailer 12
-
£434 GBP
View
Retailer 13
-
£458 GBP
View
Price last confirmed 58 days ago
A
Retailer 14
-
£468 GBP
View
A
Retailer 15
-
£481 GBP
View
A
Retailer 16
-
£484 GBP
View
B+
Retailer 17
-
£510 GBP
View
B+
Retailer 18
-
£520 GBP
View
B+
Retailer 19
-
£520 GBP
View
B+
Retailer 20
-
£532 GBP
View
B
Retailer 21
-
£885 GBP
View
B
Retailer 22
-
£1,073 GBP
View
B
Retailer 23
-
£1,201 GBP
View
Most Expensive
NZ Jewellers
0fbbc272-3477-4896-9d45-b4c12400f3fe · Sep 5
£1,258 GBP
$1,693 USD
View
Price last confirmed 61 days ago
23 more retailers have this diamond
Prices start from £276 GBPSave up to £925 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
£276 GBP