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Cushion|Natural|GIA

1.23ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 2556358703

Certificate GIA 2556358703

Diamond specifications and retailer prices

From $1,600 USD
As of November 6, 2026
Save $2,047 USD (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,647 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct natural cushion diamond

This 1.23ct 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 2556358703. Listed at 20 retailers as of November 4, 2026, with prices from $1,600 to $3,647, a $2,047 spread on the same certified stone. MOH London lists it at $3,647. 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

1.23
Carat
I
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556358703
Dimensions6.14 × 6.13 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
6.14 mm6.13 mm1.23 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556358703
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,647 USD|Low: $1,574 USD|High: $3,774 USD|Avg: $2,308 USD|-3.4%
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
November 6, 2026
Retailer 18$1,600 USD
Retailer 6$1,616 USD
Retailer 5$1,745 USD
Retailer 14$1,770 USD
Retailer 2$1,852 USD
Retailer 8$1,887 USD
Retailer 9$1,929 USD
Retailer 16$1,933 USD
Retailer 10$1,940 USD
Retailer 17$2,040 USD
Retailer 4$2,043 USD
Retailer 12$2,267 USD
Retailer 7$2,287 USD
Retailer 13$2,547 USD
Retailer 11$2,833 USD
Retailer 15$3,268 USD
Retailer 3$3,480 USD
MOH London$3,647 USD

24 data points across 18 retailers

20 retailers$1,600 USD to $3,647 USD

A
Cheapest Retailer
-
$1,600 USD
A
Retailer 2
-
$1,616 USD
View
A
Retailer 3
-
$1,745 USD
View
Final sale: no returns
A
Retailer 4
-
$1,770 USD
View
A
Retailer 5
-
$1,852 USD
View
A
Retailer 6
-
$1,887 USD
View
A
Retailer 7
-
$1,929 USD
View
A
Retailer 8
-
$1,933 USD
View
A
Retailer 9
-
$1,940 USD
View
A
Retailer 10
-
$2,040 USD
View
A
Retailer 11
-
$2,043 USD
View
A
Retailer 12
-
$2,267 USD
View
A
Retailer 13
-
$2,287 USD
View
B+
Retailer 14
-
$2,293 USD
View
B+
Retailer 15
-
$2,547 USD
View
Retailer 16
-
$2,695 USD
View
Price last confirmed 32 days ago
B+
Retailer 17
-
$2,833 USD
View
B+
Retailer 18
-
$3,268 USD
View
B+
Retailer 19
-
$3,480 USD
View
Most Expensive
B
MOH London
D0851533F · Nov 4
$3,647 USD
£2,872 GBP
View
19 more retailers have this diamond
Prices start from $1,600 USDSave up to $2,047 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
1.23ct Cushion
$1,600 USD