Round|Natural|IGI

0.45ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 800674294

Shape and cutting style on the report: Round brilliant

Certificate IGI 800674294

Diamond specifications and retailer prices

From £189 GBP
As of November 4, 2026
Save £669 GBP (78%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £858 GBP at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.45ct natural round diamond

This 0.45ct natural round sits in the sub-half-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 800674294. Listed at 13 retailers as of November 4, 2026, with prices from £189 to £858, a £669 spread on the same certified stone. NZ Jewellers lists it at £858. 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

0.45
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 800674294
Dimensions4.88 × 4.91 × 3.08 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
4.88 mm4.91 mm0.45 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 800674294
Side View
Table 57.0%Crown 34°Girdle: MediumPavilion 41.7°Culet: NoneDepth 62.9%

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 4
Current: £858 GBP|Low: £189 GBP|High: £858 GBP|Avg: £322 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
November 5, 2026
Retailer 5£189 GBP
Retailer 9£193 GBP
Retailer 4£198 GBP
Retailer 14£204 GBP
Retailer 12£211 GBP
Retailer 13£255 GBP
Retailer 7£268 GBP
Retailer 3£286 GBP
Retailer 8£295 GBP
Retailer 6£323 GBP
Retailer 2£367 GBP
Retailer 11£388 GBP
Retailer 10£437 GBP
NZ Jewellers£858 GBP

29 data points across 14 retailers

13 retailers£189 GBP to £858 GBP

A
Cheapest Retailer
-
£189 GBP
A
Retailer 2
-
£193 GBP
View
Retailer 3
-
£201 GBP
View
Price last confirmed 43 days ago
Retailer 4
-
£204 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£211 GBP
View
B+
Retailer 6
-
£255 GBP
View
B+
Retailer 7
-
£268 GBP
View
B+
Retailer 8
-
£286 GBP
View
A
Retailer 9
-
£295 GBP
View
B+
Retailer 10
-
£323 GBP
View
B+
Retailer 11
-
£367 GBP
View
B
Retailer 12
-
£437 GBP
View
Most Expensive
C
NZ Jewellers
c8024f03-3694-47a2-beab-bb6651a5c213 · Nov 4
£858 GBP
$1,155 USD
View
12 more retailers have this diamond
Prices start from £189 GBPSave up to £669 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
0.45ct Round
£189 GBP