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Cushion|Natural|GIA

1.21ct J SI1 Cushion Natural Diamond

GD • J/SI1 • GIA 6565516311

Certificate GIA 6565516311

Diamond specifications and retailer prices

From £2,614 GBP
$3,502 USD
As of October 26, 2026
Save £919 GBP (26%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,858 GBP at MOH London · As of October 25, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6565516311. Listed at 9 retailers as of October 26, 2026, with a 35% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565516311
Dimensions9.04 × 5.87 × 2.52 mm
L/W Ratio1.54
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Pinpoint
Top View
9.04 mm5.87 mm1.21 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565516311
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 42.9%

Caratlytics Score

How it works →
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: Oct 26
Current: £4,858 GBP|Low: £2,454 GBP|High: £4,910 GBP|Avg: £3,181 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 27, 2026
Retailer 7£2,614 GBP
Retailer 6£2,677 GBP
Retailer 9£2,773 GBP
Retailer 2£2,838 GBP
Retailer 5£2,901 GBP
Retailer 8£3,010 GBP
Retailer 10£3,107 GBP
Retailer 3£3,265 GBP
Retailer 4£3,532 GBP
MOH London£4,858 GBP

20 data points across 10 retailers

9 retailers£2,614 GBP to £3,532 GBP

B
Cheapest Retailer
-
£2,614 GBP
$3,502 USD
Retailer 2
-
£2,773 GBP
$3,715 USD
View
Price last confirmed 5 days ago
B
Retailer 3
-
£2,838 GBP
View
Retailer 4
-
£2,901 GBP
$3,887 USD
View
Price last confirmed 7 days ago
Retailer 5
-
£3,010 GBP
$4,034 USD
View
Price last confirmed 8 days ago
Retailer 6
-
£3,107 GBP
A$6,405 AUD
View
Price last confirmed 24 days ago
C
Retailer 7
-
£3,265 GBP
€4,167 EUR
View
C
Retailer 8
-
£3,532 GBP
ZAR 76,464 ZAR
View
Most Expensive
MOH London
5C5BD7DDD · Oct 25
£4,858 GBP
View
Price last confirmed 8 days ago
8 more retailers have this diamond
Prices start from £2,614 GBPSave up to £919 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
£2,614 GBP