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Cushion|Natural|GIA

1.20ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1559310061

Certificate GIA 1559310061

Diamond specifications and retailer prices

From $1,728 USD
As of November 6, 2026
Save $2,163 USD (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $3,891 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural cushion diamond

This 1.2ct 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 1559310061. Listed at 21 retailers as of November 4, 2026, with prices from $1,728 to $3,891, a $2,163 spread on the same certified stone. MOH London lists it at $3,891. 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

1.20
Carat
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1559310061
Dimensions6.15 × 6.03 × 4.00 mm
L/W Ratio1.02
Girdle conditionFaceted
Top View
6.15 mm6.03 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559310061
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.4%

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: $3,891 USD|Low: $1,702 USD|High: $4,053 USD|Avg: $2,352 USD|-4.0%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 7$1,728 USD
Retailer 10$1,738 USD
Retailer 9$1,862 USD
Retailer 17$1,891 USD
Retailer 2$2,015 USD
Retailer 16$2,029 USD
Retailer 3$2,050 USD
Retailer 11$2,058 USD
Retailer 4$2,065 USD
Retailer 5$2,130 USD
Retailer 12$2,160 USD
Retailer 8$2,184 USD
Retailer 6$2,288 USD
Retailer 19$2,294 USD
Retailer 14$2,420 USD
Retailer 15$2,718 USD
Retailer 13$2,766 USD
Retailer 18$3,505 USD
MOH London$3,891 USD

18 data points across 19 retailers

21 retailers$1,728 USD to $3,891 USD

A
Cheapest Retailer
-
$1,728 USD
A
Retailer 2
-
$1,738 USD
View
A
Retailer 3
-
$1,862 USD
View
Final sale: no returns
A
Retailer 4
-
$1,891 USD
View
A
Retailer 5
-
$2,015 USD
View
A
Retailer 6
-
$2,029 USD
View
A
Retailer 7
-
$2,050 USD
View
A
Retailer 8
-
$2,058 USD
View
A
Retailer 9
-
$2,065 USD
View
A
Retailer 10
-
$2,130 USD
View
A
Retailer 11
-
$2,160 USD
View
A
Retailer 12
-
$2,184 USD
View
A
Retailer 13
-
$2,288 USD
View
A
Retailer 14
-
$2,294 USD
View
B+
Retailer 15
-
$2,420 USD
View
B+
Retailer 16
-
$2,449 USD
View
B+
Retailer 17
-
$2,718 USD
View
B+
Retailer 18
-
$2,766 USD
View
Retailer 19
-
$2,940 USD
View
Price last confirmed 31 days ago
B
Retailer 20
-
$3,505 USD
View
Most Expensive
B
MOH London
E22E25E2B · Nov 4
$3,891 USD
£3,064 GBP
View
20 more retailers have this diamond
Prices start from $1,728 USDSave up to $2,163 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
1.20ct Cushion
$1,728 USD