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Cushion|Natural|GIA

1.23ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6291665728

Certificate GIA 6291665728

Diamond specifications and retailer prices

From €3,459 EUR
As of November 6, 2026
Save €2,769 EUR (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €6,228 EUR 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 6291665728. Listed at 9 retailers as of November 6, 2026, with prices from €3,459 to €6,228, a €2,769 spread on the same certified stone. MOH London lists it at €6,228. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6291665728
Dimensions6.13 × 5.85 × 3.94 mm
L/W Ratio1.05
Top View
6.13 mm5.85 mm1.23 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6291665728
Side View
Table 61.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €6,228 EUR|Low: €3,439 EUR|High: €6,493 EUR|Avg: €4,296 EUR|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 9€3,459 EUR
Retailer 5€3,511 EUR
Retailer 7€3,552 EUR
Retailer 8€3,931 EUR
Retailer 6€4,193 EUR
Retailer 3€4,424 EUR
Retailer 2€4,478 EUR
Retailer 4€4,796 EUR
MOH London€6,228 EUR

45 data points across 9 retailers

9 retailers€3,459 EUR to €6,228 EUR

B
Cheapest Retailer
-
€3,459 EUR
Retailer 2
-
€3,511 EUR
View
Price last confirmed 10 days ago
B
Retailer 3
-
€3,552 EUR
View
Retailer 4
-
€3,931 EUR
View
Price last confirmed 9 days ago
Retailer 5
-
€4,193 EUR
View
Price last confirmed 29 days ago
B
Retailer 6
-
€4,424 EUR
View
B
Retailer 7
-
€4,478 EUR
View
B
Retailer 8
-
€4,796 EUR
View
Most Expensive
B
MOH London
1B5FC5FE1 · Nov 7
€6,228 EUR
£5,475 GBP
View
8 more retailers have this diamond
Prices start from €3,459 EURSave up to €2,769 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.

B
1.23ct Cushion
€3,459 EUR