Cushion|Natural|GIA

1.21ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 1309792916

Certificate GIA 1309792916

Diamond specifications and retailer prices

From $1,894 USD
As of November 6, 2026
Save $2,554 USD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,448 USD 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 I 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 1309792916. Listed at 14 retailers as of November 4, 2026, with prices from $1,894 to $4,448, a $2,554 spread on the same certified stone. MOH London lists it at $4,448. 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
I
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1309792916
Dimensions6.26 × 5.49 × 3.94 mm
L/W Ratio1.14
Key to symbols
Feather, Twinning Wisp, Indented Natural, Natural
Top View
6.26 mm5.49 mm1.21 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1309792916
Side View
Table 58.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 71.8%

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: $4,448 USD|Low: $1,881 USD|High: $4,507 USD|Avg: $2,746 USD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 9$1,894 USD
Retailer 10$2,300 USD
Retailer 11$2,348 USD
Retailer 3$2,386 USD
Retailer 2$2,469 USD
Retailer 12$2,545 USD
Retailer 8$2,693 USD
Retailer 4$2,751 USD
Retailer 5$2,770 USD
Retailer 13$2,851 USD
Retailer 7$3,106 USD
Retailer 6$3,161 USD
MOH London$4,448 USD

31 data points across 13 retailers

14 retailers$1,894 USD to $4,448 USD

A
Cheapest Retailer
-
$1,894 USD
B+
Retailer 2
-
$2,299 USD
View
B+
Retailer 3
-
$2,300 USD
View
B+
Retailer 4
-
$2,348 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,386 USD
View
B+
Retailer 6
-
$2,469 USD
View
Retailer 7
-
$2,545 USD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
$2,633 USD
View
B+
Retailer 9
-
$2,693 USD
View
B+
Retailer 10
-
$2,770 USD
View
Retailer 11
-
$2,851 USD
View
Price last confirmed 31 days ago
B
Retailer 12
-
$3,106 USD
View
B
Retailer 13
-
$3,161 USD
View
Most Expensive
B
MOH London
BFA899C27 · Nov 4
$4,448 USD
£3,502 GBP
View
13 more retailers have this diamond
Prices start from $1,894 USDSave up to $2,554 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.

A
1.21ct Cushion
$1,894 USD