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Cushion|Natural|IGI

1.21ct H SI1 Cushion Natural Diamond

VG • H/SI1 • IGI 803629203

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI 803629203

Diamond specifications and retailer prices

From £1,107 GBP
As of November 6, 2026
Save £1,031 GBP (48%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,139 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629203. Listed at 12 retailers as of November 4, 2026, with prices from £1,107 to £2,139, a £1,031 spread on the same certified stone. MOH London lists it at £2,139. 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

1.21
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle36.8°
OriginNatural
Grading LabIGI
CertificateIGI 803629203
Dimensions7.24 × 5.56 × 3.78 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.24 mm5.56 mm1.21 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629203
Side View
Table 63.0%Crown 34.2°Girdle: THN-THKPavilion 36.8°Culet: NoneDepth 68.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,139 GBP|Low: £1,067 GBP|High: £2,236 GBP|Avg: £1,438 GBP|-3.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2£1,107 GBP
Retailer 4£1,112 GBP
Retailer 9£1,136 GBP
Retailer 10£1,250 GBP
Retailer 3£1,261 GBP
Retailer 11£1,281 GBP
Retailer 6£1,301 GBP
Retailer 7£1,354 GBP
Retailer 8£1,493 GBP
Retailer 5£1,522 GBP
MOH London£2,139 GBP

43 data points across 11 retailers

12 retailers£1,107 GBP to £2,139 GBP

A
Cheapest Retailer
-
£1,107 GBP
Final sale: no returns
A
Retailer 2
-
£1,112 GBP
View
A
Retailer 3
-
£1,136 GBP
View
A
Retailer 4
-
£1,250 GBP
View
Retailer 5
-
£1,261 GBP
View
Price last confirmed 22 days ago
B+
Retailer 6
-
£1,281 GBP
View
B+
Retailer 7
-
£1,281 GBP
View
A
Retailer 8
-
£1,301 GBP
View
A
Retailer 9
-
£1,354 GBP
View
A
Retailer 10
-
£1,493 GBP
View
A
Retailer 11
-
£1,522 GBP
View
Most Expensive
B
MOH London
0CDBA82A1 · Nov 4
£2,139 GBP
View
11 more retailers have this diamond
Prices start from £1,107 GBPSave up to £1,031 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
1.21ct Cushion
£1,107 GBP