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Cushion|Natural|IGI

1.00ct K SI1 Cushion Natural Diamond

VG • K/SI1 • IGI 808619901

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI 808619901

Diamond specifications and retailer prices

From £599 GBP
As of November 6, 2026
Save £531 GBP (47%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,130 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 808619901. Listed at 10 retailers as of November 4, 2026, with prices from £599 to £1,130, a £531 spread on the same certified stone. MOH London lists it at £1,130. 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

1.00
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle40.8°
Pavilion angle28.3°
OriginNatural
Grading LabIGI
CertificateIGI 808619901
Dimensions5.54 × 5.03 × 3.65 mm
L/W Ratio1.10
Girdle conditionFaceted
Top View
5.54 mm5.03 mm1.00 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 808619901
Side View
Table 63.0%Crown 40.8°Girdle: THK-VTKPavilion 28.3°Culet: NoneDepth 72.6%

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 6
Current: £1,130 GBP|Low: £598 GBP|High: £1,145 GBP|Avg: £721 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2£599 GBP
Retailer 6£618 GBP
Retailer 5£620 GBP
Retailer 10£626 GBP
Retailer 7£636 GBP
Retailer 8£705 GBP
Retailer 9£716 GBP
Retailer 4£754 GBP
Retailer 3£759 GBP
MOH London£1,130 GBP

43 data points across 10 retailers

10 retailers£599 GBP to £1,130 GBP

A
Cheapest Retailer
-
£599 GBP
Retailer 2
-
£618 GBP
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£620 GBP
View
B+
Retailer 4
-
£626 GBP
View
B+
Retailer 5
-
£636 GBP
View
B+
Retailer 6
-
£705 GBP
View
B+
Retailer 7
-
£716 GBP
View
B+
Retailer 8
-
£754 GBP
View
B+
Retailer 9
-
£759 GBP
View
Most Expensive
B+
MOH London
103165640 · Nov 4
£1,130 GBP
View
9 more retailers have this diamond
Prices start from £599 GBPSave up to £531 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
1.00ct Cushion
£599 GBP