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Cushion|Natural|GIA

1.21ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 5136915906

Certificate GIA 5136915906

Diamond specifications and retailer prices

From £3,308 GBP
As of November 4, 2026
Save £2,718 GBP (45%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £6,026 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 G 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 5136915906. Listed at 9 retailers as of November 4, 2026, with prices from £3,308 to £6,026, a £2,718 spread on the same certified stone. MOH London lists it at £6,026. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5136915906
Dimensions5.85 × 5.75 × 3.76 mm
L/W Ratio1.02
Top View
5.85 mm5.75 mm1.21 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 5136915906
Side View
Table 61.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 65.4%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: £6,026 GBP|Low: £3,291 GBP|High: £6,115 GBP|Avg: £4,116 GBP|+2.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9£3,308 GBP
Retailer 5£3,336 GBP
Retailer 7£3,413 GBP
Retailer 8£3,794 GBP
Retailer 6£3,824 GBP
Retailer 3£4,044 GBP
Retailer 2£4,269 GBP
Retailer 4£4,628 GBP
MOH London£6,026 GBP

42 data points across 9 retailers

9 retailers£3,308 GBP to £6,026 GBP

B
Cheapest Retailer
-
£3,308 GBP
B
Retailer 2
-
£3,336 GBP
View
B
Retailer 3
-
£3,413 GBP
View
Retailer 4
-
£3,794 GBP
View
Price last confirmed 9 days ago
Retailer 5
-
£3,824 GBP
View
Price last confirmed 29 days ago
B
Retailer 6
-
£4,044 GBP
View
B
Retailer 7
-
£4,269 GBP
View
B
Retailer 8
-
£4,628 GBP
View
Most Expensive
B
MOH London
FC016585B · Nov 4
£6,026 GBP
View
8 more retailers have this diamond
Prices start from £3,308 GBPSave up to £2,718 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
£3,308 GBP