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Round|Natural|IGI

0.91ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 815674379

Shape and cutting style on the report: Round brilliant

Certificate IGI 815674379

Diamond specifications and retailer prices

From £398 GBP
As of November 5, 2026
Save £1,250 GBP (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,648 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.91ct natural round diamond

This 0.91ct natural round sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 815674379. Listed at 12 retailers as of November 5, 2026, with prices from £398 to £1,648, a £1,250 spread on the same certified stone. NZ Jewellers lists it at £1,648. 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

0.91
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 815674379
Dimensions6.16 × 6.19 × 3.88 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeMedium
Top View
6.16 mm6.19 mm0.91 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 815674379
Side View
Table 57.0%Crown 35.8°Girdle: MediumPavilion 41.2°Culet: MediumDepth 63.0%

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: £1,648 GBP|Low: £398 GBP|High: £1,713 GBP|Avg: £707 GBP|-3.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8£398 GBP
Retailer 9£525 GBP
Retailer 3£541 GBP
Retailer 10£545 GBP
Retailer 4£559 GBP
Retailer 7£606 GBP
Retailer 2£623 GBP
Retailer 6£637 GBP
Retailer 12£655 GBP
Retailer 5£700 GBP
Retailer 11£974 GBP
NZ Jewellers£1,648 GBP

23 data points across 12 retailers

12 retailers£398 GBP to £1,648 GBP

A
Cheapest Retailer
-
£398 GBP
A
Retailer 2
-
£525 GBP
View
Retailer 3
-
£541 GBP
View
Price last confirmed 8 days ago
A
Retailer 4
-
£545 GBP
View
Retailer 5
-
£559 GBP
View
Price last confirmed 17 days ago
A
Retailer 6
-
£606 GBP
View
A
Retailer 7
-
£623 GBP
View
A
Retailer 8
-
£637 GBP
View
A
Retailer 9
-
£655 GBP
View
A
Retailer 10
-
£700 GBP
View
B+
Retailer 11
-
£974 GBP
View
Most Expensive
B
NZ Jewellers
73dd6ff7-f892-4d8f-b344-4a756050168b · Nov 5
£1,648 GBP
$2,218 USD
View
11 more retailers have this diamond
Prices start from £398 GBPSave up to £1,250 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
0.91ct Round
£398 GBP