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Cushion|Natural|GIA

1.21ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 7191728315

Certificate GIA 7191728315

Diamond specifications and retailer prices

From £2,081 GBP
As of November 4, 2026
Save £2,451 GBP (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,533 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7191728315. Listed at 15 retailers as of November 2, 2026, with prices from £2,081 to £4,533, a £2,451 spread on the same certified stone. MOH London lists it at £4,533. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7191728315
Dimensions6.72 × 5.63 × 3.86 mm
L/W Ratio1.19
Top View
6.72 mm5.63 mm1.21 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 7191728315
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £4,533 GBP|Low: £2,113 GBP|High: £4,588 GBP|Avg: £2,884 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£2,113 GBP
Retailer 5£2,137 GBP
Retailer 7£2,456 GBP
Retailer 6£2,637 GBP
Retailer 3£2,788 GBP
Retailer 2£2,977 GBP
Retailer 4£3,308 GBP
MOH London£4,533 GBP

44 data points across 8 retailers

15 retailers£2,081 GBP to £4,533 GBP

B
Cheapest Retailer
-
£2,081 GBP
B
Retailer 2
-
£2,113 GBP
View
B
Retailer 3
-
£2,137 GBP
View
B
Retailer 4
-
£2,171 GBP
View
B
Retailer 5
-
£2,179 GBP
View
B
Retailer 6
-
£2,327 GBP
View
B
Retailer 7
-
£2,376 GBP
View
Retailer 8
-
£2,456 GBP
View
Price last confirmed 9 days ago
B
Retailer 9
-
£2,637 GBP
View
B
Retailer 10
-
£2,669 GBP
View
B
Retailer 11
-
£2,788 GBP
View
B
Retailer 12
-
£2,977 GBP
View
Retailer 13
-
£3,070 GBP
View
Price last confirmed 15 days ago
B
Retailer 14
-
£3,308 GBP
View
Most Expensive
B
MOH London
7F28ECEFC · Nov 2
£4,533 GBP
View
14 more retailers have this diamond
Prices start from £2,081 GBPSave up to £2,451 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
£2,081 GBP