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Round|Natural|IGI

1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 803680527

Shape and cutting style on the report: Round brilliant

Certificate IGI 803680527

Diamond specifications and retailer prices

From £1,222 GBP
As of November 1, 2026
Save £2,172 GBP (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,394 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 803680527. Listed at 16 retailers as of November 1, 2026, with prices from £1,222 to £3,394, a £2,172 spread on the same certified stone. NZ Jewellers lists it at £3,394. 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 angle34.1°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 803680527
Dimensions6.88 × 6.94 × 4.34 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.88 mm6.94 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803680527
Side View
Table 58.0%Crown 34.1°Girdle: MED-STKPavilion 41.4°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 1
Current: £3,394 GBP|Low: £1,222 GBP|High: £3,394 GBP|Avg: £1,671 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
Retailer 15
Retailer 16
November 6, 2026
Retailer 6£1,222 GBP
Retailer 7£1,268 GBP
Retailer 2£1,331 GBP
Retailer 8£1,356 GBP
Retailer 14£1,392 GBP
Retailer 16£1,392 GBP
Retailer 4£1,430 GBP
Retailer 15£1,456 GBP
Retailer 5£1,493 GBP
Retailer 9£1,519 GBP
Retailer 3£1,606 GBP
Retailer 10£1,613 GBP
Retailer 11£1,698 GBP
Retailer 12£1,888 GBP
Retailer 13£2,431 GBP
NZ Jewellers£3,394 GBP

21 data points across 16 retailers

16 retailers£1,222 GBP to £3,394 GBP

A
Cheapest Retailer
-
£1,222 GBP
A
Retailer 2
-
£1,268 GBP
View
A
Retailer 3
-
£1,331 GBP
View
A
Retailer 4
-
£1,356 GBP
View
Retailer 5
-
£1,392 GBP
View
Price last confirmed 8 days ago
A
Retailer 6
-
£1,392 GBP
View
A
Retailer 7
-
£1,430 GBP
View
A
Retailer 8
-
£1,456 GBP
View
A
Retailer 9
-
£1,493 GBP
View
A
Retailer 10
-
£1,519 GBP
View
A
Retailer 11
-
£1,606 GBP
View
A
Retailer 12
-
£1,613 GBP
View
A
Retailer 13
-
£1,698 GBP
View
B+
Retailer 14
-
£1,888 GBP
View
B+
Retailer 15
-
£2,431 GBP
View
Most Expensive
B
NZ Jewellers
3006bd38-023d-4a74-ae31-328dbbbb3290 · Nov 5
£3,394 GBP
$4,568 USD
View
15 more retailers have this diamond
Prices start from £1,222 GBPSave up to £2,172 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
£1,222 GBP