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1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 651482131

Shape and cutting style on the report: Round brilliant

Certificate IGI 651482131

Diamond specifications and retailer prices

From £1,019 GBP
As of November 5, 2026
Save £2,146 GBP (68%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,164 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 651482131. Listed at 19 retailers as of November 5, 2026, with prices from £1,019 to £3,164, a £2,146 spread on the same certified stone. NZ Jewellers lists it at £3,164. 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

1.30
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.8°
OriginNatural
Grading LabIGI
CertificateIGI 651482131
Dimensions6.95 × 6.91 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.95 mm6.91 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 651482131
Side View
Table 59.0%Crown 33.8°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.9%

Caratlytics Score

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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: £1,019 GBP|Low: £1,019 GBP|High: £2,300 GBP|Avg: £1,579 GBP|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 1£1,019 GBP
Retailer 7£1,126 GBP
Retailer 2£1,227 GBP
Retailer 8£1,375 GBP
Retailer 4£1,456 GBP
Retailer 3£1,583 GBP
Retailer 6£1,723 GBP
Retailer 5£2,266 GBP

32 data points across 8 retailers

19 retailers£1,019 GBP to £3,164 GBP

A
Cheapest Retailer
-
£1,019 GBP
A
Retailer 2
-
£1,126 GBP
View
A
Retailer 3
-
£1,182 GBP
View
A
Retailer 4
-
£1,227 GBP
View
A
Retailer 5
-
£1,297 GBP
View
Retailer 6
-
£1,297 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
£1,345 GBP
View
A
Retailer 8
-
£1,357 GBP
View
A
Retailer 9
-
£1,375 GBP
View
A
Retailer 10
-
£1,399 GBP
View
B+
Retailer 11
-
£1,431 GBP
View
A
Retailer 12
-
£1,456 GBP
View
B+
Retailer 13
-
£1,497 GBP
View
A
Retailer 14
-
£1,583 GBP
View
A
Retailer 15
-
£1,723 GBP
View
B+
Retailer 16
-
£1,955 GBP
View
B+
Retailer 17
-
£2,147 GBP
View
B+
Retailer 18
-
£2,266 GBP
View
Most Expensive
B
NZ Jewellers
e921917e-3950-4f9e-82a3-5d889092efa1 · Nov 5
£3,164 GBP
$4,259 USD
View
18 more retailers have this diamond
Prices start from £1,019 GBPSave up to £2,146 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
1.30ct Round
£1,019 GBP