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Cushion|Natural|GIA

1.21ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6542540034

Certificate GIA 6542540034

Diamond specifications and retailer prices

From £2,146 GBP
As of November 6, 2026
Save £2,278 GBP (51%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,423 GBP at MOH London · As of November 2, 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 6542540034. Listed at 19 retailers as of November 2, 2026, with prices from £2,146 to £4,423, a £2,278 spread on the same certified stone. MOH London lists it at £4,423. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6542540034
Dimensions7.29 × 5.37 × 3.69 mm
L/W Ratio1.36
Cert comments
Additional pinpoints are not shown.
Key to symbols
Crystal, Feather, Pinpoint
Top View
7.29 mm5.37 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542540034
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.7%

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 6
Current: £4,423 GBP|Low: £2,027 GBP|High: £4,477 GBP|Avg: £2,768 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 12£2,146 GBP
Retailer 10£2,211 GBP
Retailer 11£2,243 GBP
Retailer 3£2,250 GBP
Retailer 9£2,396 GBP
Retailer 2£2,566 GBP
Retailer 8£2,717 GBP
Retailer 6£2,720 GBP
Retailer 4£2,832 GBP
Retailer 5£3,079 GBP
Retailer 7£3,228 GBP
MOH London£4,423 GBP

38 data points across 12 retailers

19 retailers£2,146 GBP to £4,423 GBP

Retailer 1
-
£2,098 GBP
Price last confirmed 31 days ago
B+
Retailer 2
-
£2,146 GBP
View
B+
Retailer 3
-
£2,211 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,243 GBP
View
B+
Retailer 5
-
£2,250 GBP
View
Retailer 6
-
£2,396 GBP
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£2,566 GBP
View
B
Retailer 8
-
£2,576 GBP
View
B
Retailer 9
-
£2,717 GBP
View
Retailer 10
-
£2,717 GBP
View
Price last confirmed 19 days ago
B
Retailer 11
-
£2,719 GBP
View
B
Retailer 12
-
£2,719 GBP
View
B
Retailer 13
-
£2,720 GBP
View
B
Retailer 14
-
£2,809 GBP
View
Retailer 15
-
£2,832 GBP
View
Price last confirmed 30 days ago
Retailer 16
-
£2,997 GBP
View
Price last confirmed 15 days ago
B
Retailer 17
-
£3,079 GBP
View
B
Retailer 18
-
£3,228 GBP
View
Most Expensive
B
MOH London
AB3735B3F · Nov 2
£4,423 GBP
View
18 more retailers have this diamond
Prices start from £2,146 GBPSave up to £2,278 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+
1.21ct Cushion
£2,146 GBP