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Round|Natural|IGI

0.30ct K SI1 Round Natural Diamond

VG • K/SI1 • IGI 815638728

Shape and cutting style on the report: Round brilliant

Certificate IGI 815638728

Diamond specifications and retailer prices

From £82 GBP
As of November 4, 2026
Save £458 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £540 GBP at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.3ct natural round diamond

This 0.3ct natural round sits in the sub-half-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 815638728. Listed at 16 retailers as of November 4, 2026, with prices from £82 to £540, a £458 spread on the same certified stone. NZ Jewellers lists it at £540. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.30
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.7°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 815638728
Dimensions4.25 × 4.28 × 2.62 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
4.25 mm4.28 mm0.30 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 815638728
Side View
Table 56.0%Crown 33.7°Girdle: STK-THKPavilion 40.3°Culet: NoneDepth 61.4%

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 4
Current: £239 GBP|Low: £82 GBP|High: £278 GBP|Avg: £177 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 4£82 GBP
Retailer 6£123 GBP
Retailer 9£133 GBP
Retailer 10£144 GBP
Retailer 2£160 GBP
Retailer 3£175 GBP
Retailer 5£185 GBP
Retailer 8£221 GBP
Retailer 1£239 GBP
Retailer 7£274 GBP

41 data points across 10 retailers

16 retailers£82 GBP to £540 GBP

A
Cheapest Retailer
-
£82 GBP
B+
Retailer 2
-
£119 GBP
View
B+
Retailer 3
-
£123 GBP
View
Retailer 4
-
£129 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£133 GBP
View
B+
Retailer 6
-
£144 GBP
View
B+
Retailer 7
-
£149 GBP
View
B+
Retailer 8
-
£160 GBP
View
B+
Retailer 9
-
£175 GBP
View
B+
Retailer 10
-
£185 GBP
View
B+
Retailer 11
-
£215 GBP
View
B+
Retailer 12
-
£221 GBP
View
B+
Retailer 13
-
£239 GBP
View
B
Retailer 14
-
£274 GBP
View
B
Retailer 15
-
£279 GBP
View
Most Expensive
C
NZ Jewellers
3c22a5fe-8b57-4ff8-b232-2a8df9a8565b · Nov 4
£540 GBP
$727 USD
View
15 more retailers have this diamond
Prices start from £82 GBPSave up to £458 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
0.30ct Round
£82 GBP