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Cushion|Natural|IGI

1.00ct K SI1 Cushion Natural Diamond

GD • K/SI1 • IGI 270773253

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI 270773253

Diamond specifications and retailer prices

From £767 GBP
As of November 5, 2026
Save £849 GBP (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,616 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 standard cut grade and certified by IGI 270773253. Listed at 10 retailers as of November 4, 2026, with prices from £767 to £1,616, a £849 spread on the same certified stone. MOH London lists it at £1,616. 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
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabIGI
CertificateIGI 270773253
Dimensions5.91 × 5.78 × 4.01 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
5.91 mm5.78 mm1.00 ctK / SI1
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI 270773253
Side View
Table 64.5%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 69.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,616 GBP|Low: £767 GBP|High: £1,640 GBP|Avg: £1,011 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£767 GBP
Retailer 10£770 GBP
Retailer 5£773 GBP
Retailer 6£801 GBP
Retailer 7£889 GBP
Retailer 3£1,009 GBP
Retailer 4£1,079 GBP
Retailer 2£1,115 GBP
Retailer 9£1,222 GBP
MOH London£1,616 GBP

43 data points across 10 retailers

10 retailers£767 GBP to £1,616 GBP

B+
Cheapest Retailer
-
£767 GBP
B+
Retailer 2
-
£770 GBP
View
B+
Retailer 3
-
£773 GBP
View
Retailer 4
-
£801 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£889 GBP
View
B+
Retailer 6
-
£1,009 GBP
View
B+
Retailer 7
-
£1,079 GBP
View
B
Retailer 8
-
£1,115 GBP
View
B
Retailer 9
-
£1,222 GBP
View
Most Expensive
B
MOH London
FADB9622D · Nov 4
£1,616 GBP
View
9 more retailers have this diamond
Prices start from £767 GBPSave up to £849 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.

B+
1.00ct Cushion
£767 GBP