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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 €1,409 EUR
HK$12,300 HKD
As of November 1, 2026
Save €1,882 EUR (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €3,291 EUR at MOH London · As of October 29, 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 October 29, 2026, with prices from €1,409 to €3,291, a €1,882 spread on the same certified stone. MOH London lists it at €3,291. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €3,291 EUR|Low: €1,409 EUR|High: €3,478 EUR|Avg: €2,129 EUR|-5.4%
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 1, 2026
Retailer 2€1,409 EUR
Retailer 16€1,437 EUR
Retailer 15€1,540 EUR
Retailer 4€1,584 EUR
Retailer 13€1,643 EUR
Retailer 5€1,690 EUR
Retailer 7€1,727 EUR
Retailer 8€1,736 EUR
Retailer 12€1,807 EUR
Retailer 9€1,826 EUR
Retailer 14€2,020 EUR
Retailer 3€2,047 EUR
Retailer 18€2,296 EUR
Retailer 10€2,413 EUR
Retailer 17€2,551 EUR
Retailer 6€2,926 EUR
Retailer 11€3,070 EUR
MOH London€3,291 EUR

25 data points across 18 retailers

20 retailers€1,409 EUR to €3,291 EUR

A
Cheapest Retailer
-
€1,409 EUR
HK$12,300 HKD
A
Retailer 2
-
€1,437 EUR
$1,605 USD
View
A
Retailer 3
-
€1,540 EUR
$1,720 USD
View
Final sale: no returns
A
Retailer 4
-
€1,584 EUR
$1,770 USD
View
A
Retailer 5
-
€1,643 EUR
View
A
Retailer 6
-
€1,690 EUR
$1,888 USD
View
A
Retailer 7
-
€1,727 EUR
$1,929 USD
View
A
Retailer 8
-
€1,731 EUR
A$2,975 AUD
View
A
Retailer 9
-
€1,736 EUR
$1,940 USD
View
A
Retailer 10
-
€1,807 EUR
$2,019 USD
View
A
Retailer 11
-
€1,826 EUR
$2,040 USD
View
A
Retailer 12
-
€2,020 EUR
£1,777 GBP
View
A
Retailer 13
-
€2,047 EUR
$2,287 USD
View
B+
Retailer 14
-
€2,053 EUR
A$3,528 AUD
View
B+
Retailer 15
-
€2,296 EUR
ZAR 41,446 ZAR
View
Retailer 16
-
€2,413 EUR
A$4,147 AUD
View
Price last confirmed 26 days ago
B+
Retailer 17
-
€2,551 EUR
View
Retailer 18
-
€2,926 EUR
$3,269 USD
View
Price last confirmed 9 days ago
B+
Retailer 19
-
€3,070 EUR
$3,430 USD
View
Most Expensive
B
MOH London
D0851533F · Oct 29
€3,291 EUR
£2,895 GBP
View
19 more retailers have this diamond
Prices start from €1,409 EURSave up to €1,882 EUR

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
€1,409 EUR