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0.28ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 818693167

Shape and cutting style on the report: Round brilliant

Certificate IGI 818693167

Diamond specifications and retailer prices

From £57 GBP
As of November 6, 2026
Save £178 GBP (76%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £235 GBP at B2C Jewels · As of November 6, 2026
View at B2C Jewels

About this 0.28ct natural round diamond

This 0.28ct 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 818693167. Listed at 5 retailers as of November 6, 2026, with prices from £57 to £235, a £178 spread on the same certified stone. B2C Jewels lists it at £235. 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

0.28
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.8°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 818693167
Dimensions4.20 × 4.23 × 2.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT Faint Brown
Top View
4.20 mm4.23 mm0.28 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 818693167
Side View
Table 58.0%Crown 33.8°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £235 GBP|Low: £57 GBP|High: £235 GBP|Avg: £155 GBP
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2£57 GBP
Retailer 4£107 GBP
Retailer 3£178 GBP
Retailer 5£201 GBP
B2C Jewels£235 GBP

37 data points across 5 retailers

5 retailers£57 GBP to £235 GBP

A
Cheapest Retailer
-
£57 GBP
B+
Retailer 2
-
£107 GBP
View
B+
Retailer 3
-
£178 GBP
View
B+
Retailer 4
-
£201 GBP
View
Most Expensive
B
B2C Jewels
36867921 · Nov 6
£235 GBP
$316 USD
View
4 more retailers have this diamond
Prices start from £57 GBPSave up to £178 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
0.28ct Round
£57 GBP