Round|Natural|GIA

0.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6505375298

Certificate GIA 6505375298

Diamond specifications and retailer prices

From £305 GBP
As of November 5, 2026
Save £1,002 GBP (77%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,307 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505375298. Listed at 19 retailers as of November 4, 2026, with prices from £305 to £1,307, a £1,002 spread on the same certified stone. NZ Jewellers lists it at £1,307. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6505375298
Dimensions5.08 × 5.06 × 3.17 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
5.08 mm5.06 mm0.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6505375298
Side View
Table 57.0%Crown 35°Girdle: THN-STKPavilion 41.4°Culet: NoneDepth 62.5%

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: £1,307 GBP|Low: £305 GBP|High: £1,307 GBP|Avg: £662 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£305 GBP
Retailer 7£420 GBP
Retailer 2£434 GBP
Retailer 5£503 GBP
Retailer 4£557 GBP
Retailer 9£561 GBP
Retailer 6£643 GBP
Retailer 8£961 GBP
NZ Jewellers£1,307 GBP

38 data points across 9 retailers

19 retailers£305 GBP to £1,307 GBP

A
Cheapest Retailer
-
£305 GBP
B+
Retailer 2
-
£395 GBP
View
B+
Retailer 3
-
£417 GBP
View
Retailer 4
-
£417 GBP
View
Price last confirmed 43 days ago
B+
Retailer 5
-
£420 GBP
View
B+
Retailer 6
-
£434 GBP
View
Retailer 7
-
£449 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£449 GBP
View
B+
Retailer 9
-
£481 GBP
View
Retailer 10
-
£481 GBP
View
Price last confirmed 45 days ago
B+
Retailer 11
-
£503 GBP
View
B
Retailer 12
-
£514 GBP
View
B
Retailer 13
-
£547 GBP
View
B+
Retailer 14
-
£557 GBP
View
B
Retailer 15
-
£561 GBP
View
B
Retailer 16
-
£643 GBP
View
B
Retailer 17
-
£961 GBP
View
Retailer 18
-
£1,307 GBP
View
Price last confirmed 43 days ago
Most Expensive
B
NZ Jewellers
405abf71-43c0-4f79-85d8-3369ef7c483a · Nov 4
£1,307 GBP
$1,759 USD
View
18 more retailers have this diamond
Prices start from £305 GBPSave up to £1,002 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
£305 GBP