CaratHunter
Plans
Cushion|Natural|GIA

1.21ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1555442161

Certificate GIA 1555442161

Diamond specifications and retailer prices

From £927 GBP
As of November 6, 2026
Save £1,315 GBP (59%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,242 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 J 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 1555442161. Listed at 7 retailers as of November 4, 2026, with prices from £927 to £2,242, a £1,315 spread on the same certified stone. MOH London lists it at £2,242. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555442161
Dimensions7.10 × 5.50 × 3.84 mm
L/W Ratio1.29
Key to symbols
Crystal, Feather, Needle
Top View
7.10 mm5.50 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555442161
Side View
Table 64.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 69.7%

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: £2,242 GBP|Low: £927 GBP|High: £2,488 GBP|Avg: £1,451 GBP|-8.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£927 GBP
Retailer 5£1,152 GBP
Retailer 6£1,213 GBP
Retailer 7£1,222 GBP
Retailer 4£1,289 GBP
Retailer 3£1,740 GBP
MOH London£2,242 GBP

33 data points across 7 retailers

7 retailers£927 GBP to £2,242 GBP

A
Cheapest Retailer
-
£927 GBP
A
Retailer 2
-
£1,152 GBP
View
A
Retailer 3
-
£1,213 GBP
View
A
Retailer 4
-
£1,222 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,289 GBP
View
B+
Retailer 6
-
£1,740 GBP
View
Most Expensive
B
MOH London
90FC66B24 · Nov 4
£2,242 GBP
View
6 more retailers have this diamond
Prices start from £927 GBPSave up to £1,315 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
£927 GBP