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Cushion|Natural|GIA

1.21ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 7553811117

Certificate GIA 7553811117

Diamond specifications and retailer prices

From £1,587 GBP
As of November 6, 2026
Save £2,100 GBP (57%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,687 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7553811117. Listed at 17 retailers as of November 4, 2026, with prices from £1,587 to £3,687, a £2,100 spread on the same certified stone. MOH London lists it at £3,687. 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

1.21
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7553811117
Dimensions7.05 × 5.38 × 3.74 mm
L/W Ratio1.31
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Knot, Feather, Needle
Top View
7.05 mm5.38 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7553811117
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 69.4%

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: £3,687 GBP|Low: £1,587 GBP|High: £3,736 GBP|Avg: £2,331 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 13£1,587 GBP
Retailer 2£1,653 GBP
Retailer 11£1,880 GBP
Retailer 4£1,947 GBP
Retailer 6£2,047 GBP
Retailer 5£2,120 GBP
Retailer 8£2,208 GBP
Retailer 3£2,216 GBP
Retailer 9£2,220 GBP
Retailer 12£2,294 GBP
Retailer 7£2,456 GBP
Retailer 10£2,575 GBP
MOH London£3,687 GBP

25 data points across 13 retailers

17 retailers£1,587 GBP to £3,687 GBP

A
Cheapest Retailer
-
£1,587 GBP
A
Retailer 2
-
£1,653 GBP
View
B+
Retailer 3
-
£1,880 GBP
View
B+
Retailer 4
-
£1,947 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,996 GBP
View
B+
Retailer 6
-
£1,999 GBP
View
B+
Retailer 7
-
£2,047 GBP
View
Retailer 8
-
£2,120 GBP
View
Price last confirmed 9 days ago
B+
Retailer 9
-
£2,126 GBP
View
B+
Retailer 10
-
£2,208 GBP
View
B+
Retailer 11
-
£2,216 GBP
View
B+
Retailer 12
-
£2,220 GBP
View
B
Retailer 13
-
£2,294 GBP
View
Retailer 14
-
£2,400 GBP
View
Price last confirmed 31 days ago
B+
Retailer 15
-
£2,456 GBP
View
B
Retailer 16
-
£2,575 GBP
View
Most Expensive
B
MOH London
A1072B078 · Nov 4
£3,687 GBP
View
16 more retailers have this diamond
Prices start from £1,587 GBPSave up to £2,100 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
£1,587 GBP