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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 $2,329 AUD
As of November 6, 2026
Save $2,965 AUD (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,294 AUD at MOH London · As of November 7, 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 6, 2026, with prices from $2,329 to $5,294, a $2,965 spread on the same certified stone. MOH London lists it at $5,294. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,294 AUD|Low: $2,291 AUD|High: $5,493 AUD|Avg: $3,324 AUD|-3.6%
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 7, 2026
Retailer 18$2,329 AUD
Retailer 6$2,352 AUD
Retailer 5$2,540 AUD
Retailer 14$2,576 AUD
Retailer 11$2,695 AUD
Retailer 8$2,746 AUD
Retailer 9$2,807 AUD
Retailer 16$2,813 AUD
Retailer 10$2,823 AUD
Retailer 17$2,969 AUD
Retailer 4$2,973 AUD
Retailer 2$3,299 AUD
Retailer 7$3,328 AUD
Retailer 13$3,707 AUD
Retailer 12$4,123 AUD
Retailer 15$4,756 AUD
Retailer 3$5,065 AUD
MOH London$5,294 AUD

25 data points across 18 retailers

20 retailers$2,329 AUD to $5,294 AUD

A
Cheapest Retailer
-
$2,329 AUD
A
Retailer 2
-
$2,352 AUD
View
A
Retailer 3
-
$2,540 AUD
View
Final sale: no returns
A
Retailer 4
-
$2,576 AUD
View
A
Retailer 5
-
$2,695 AUD
View
A
Retailer 6
-
$2,746 AUD
View
A
Retailer 7
-
$2,807 AUD
View
A
Retailer 8
-
$2,813 AUD
View
A
Retailer 9
-
$2,823 AUD
View
A
Retailer 10
-
$2,969 AUD
View
A
Retailer 11
-
$2,973 AUD
View
A
Retailer 12
-
$3,299 AUD
View
A
Retailer 13
-
$3,328 AUD
View
B+
Retailer 14
-
$3,337 AUD
View
B+
Retailer 15
-
$3,707 AUD
View
Retailer 16
-
$3,922 AUD
View
Price last confirmed 32 days ago
B+
Retailer 17
-
$4,123 AUD
View
B+
Retailer 18
-
$4,756 AUD
View
B+
Retailer 19
-
$5,065 AUD
View
Most Expensive
B
MOH London
D0851533F · Nov 7
$5,294 AUD
£2,864 GBP
View
19 more retailers have this diamond
Prices start from $2,329 AUDSave up to $2,965 AUD

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
$2,329 AUD