Cushion|Natural|GIA

1.21ct J SI1 Cushion Natural Diamond

GD • J/SI1 • GIA 6565516311

Certificate GIA 6565516311

Diamond specifications and retailer prices

From $3,502 USD
As of October 26, 2026
Save $1,231 USD (26%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,509 USD 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
Color
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: $6,509 USD|Low: $3,288 USD|High: $6,579 USD|Avg: $4,262 USD|-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$3,502 USD
Retailer 6$3,587 USD
Retailer 9$3,715 USD
Retailer 2$3,803 USD
Retailer 5$3,887 USD
Retailer 8$4,034 USD
Retailer 10$4,164 USD
Retailer 3$4,375 USD
Retailer 4$4,733 USD
MOH London$6,509 USD

20 data points across 10 retailers

9 retailers$3,502 USD to $4,733 USD

B
Cheapest Retailer
-
$3,502 USD
B
Retailer 2
-
$3,715 USD
View
B
Retailer 3
-
$3,803 USD
£2,995 GBP
View
Retailer 4
-
$3,887 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$4,034 USD
View
Price last confirmed 8 days ago
Retailer 6
-
$4,164 USD
A$6,405 AUD
View
Price last confirmed 24 days ago
C
Retailer 7
-
$4,375 USD
€4,167 EUR
View
C
Retailer 8
-
$4,733 USD
ZAR 76,464 ZAR
View
Most Expensive
MOH London
5C5BD7DDD · Oct 25
$6,509 USD
£5,125 GBP
View
Price last confirmed 8 days ago
8 more retailers have this diamond
Prices start from $3,502 USDSave up to $1,231 USD

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
$3,502 USD