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Round|Natural|IGI

0.91ct K SI2 Round Natural Diamond

VG • K/SI2 • IGI 654480786

Shape and cutting style on the report: Round brilliant

Certificate IGI 654480786

Diamond specifications and retailer prices

From £643 GBP
As of November 5, 2026
Save £638 GBP (50%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,226 GBP at NZ Jewellers · As of September 23, 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 very-good cut grade and certified by IGI 654480786. Listed at 8 retailers as of November 4, 2026, with a 99% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.91
Carat
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle37.4°
Pavilion angle40.2°
OriginNatural
Grading LabIGI
CertificateIGI 654480786
Dimensions6.08 × 6.04 × 3.89 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.08 mm6.04 mm0.91 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 654480786
Side View
Table 55.0%Crown 37.4°Girdle: MED-THKPavilion 40.2°Culet: NoneDepth 64.1%

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: £921 GBP|Low: £643 GBP|High: £1,878 GBP|Avg: £1,024 GBP|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 5£643 GBP
Retailer 7£649 GBP
Retailer 3£711 GBP
Retailer 4£797 GBP
Retailer 1£921 GBP
Retailer 8£1,022 GBP
Retailer 2£1,282 GBP
Retailer 6£1,878 GBP

31 data points across 8 retailers

8 retailers£643 GBP to £1,282 GBP

A
Cheapest Retailer
-
£643 GBP
Retailer 2
-
£649 GBP
View
Price last confirmed 45 days ago
B+
Retailer 3
-
£711 GBP
View
Retailer 4
-
£749 GBP
View
Price last confirmed 45 days ago
B+
Retailer 5
-
£797 GBP
View
B+
Retailer 6
-
£921 GBP
View
B
Retailer 7
-
£1,282 GBP
View
Most Expensive
NZ Jewellers
8679f075-388e-430b-bd5e-549e4aecc65c · Sep 23
£2,226 GBP
$2,996 USD
View
Price last confirmed 44 days ago
7 more retailers have this diamond
Prices start from £643 GBPSave up to £638 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