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0.91ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 380991212

Shape and cutting style on the report: Round brilliant

Certificate IGI 380991212

Diamond specifications and retailer prices

From £643 GBP
As of November 5, 2026
Save £1,373 GBP (68%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,016 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 380991212. Listed at 8 retailers as of November 5, 2026, with prices from £643 to £2,016, a £1,373 spread on the same certified stone. NZ Jewellers lists it at £2,016. 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
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 380991212
Dimensions6.11 × 6.13 × 3.83 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.11 mm6.13 mm0.91 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 380991212
Side View
Table 59.0%Crown 36.5°Girdle: ThickPavilion 40.5°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
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: £2,016 GBP|Low: £503 GBP|High: £2,016 GBP|Avg: £757 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 3, 2026
Retailer 9£503 GBP
Retailer 2£643 GBP
Retailer 8£644 GBP
Retailer 3£651 GBP
Retailer 6£667 GBP
Retailer 5£742 GBP
Retailer 7£742 GBP
Retailer 4£1,100 GBP
NZ Jewellers£2,016 GBP

4 data points across 9 retailers

8 retailers£643 GBP to £2,016 GBP

A
Cheapest Retailer
-
£643 GBP
Retailer 2
-
£644 GBP
View
Price last confirmed 109 days ago
A
Retailer 3
-
£651 GBP
View
A
Retailer 4
-
£667 GBP
View
B+
Retailer 5
-
£742 GBP
View
B+
Retailer 6
-
£742 GBP
View
B
Retailer 7
-
£1,100 GBP
View
Most Expensive
C
NZ Jewellers
0fadc34a-7b3e-43bf-aebc-69cb4188f7f7 · Nov 5
£2,016 GBP
$2,713 USD
View
7 more retailers have this diamond
Prices start from £643 GBPSave up to £1,373 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
£643 GBP