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Cushion|Natural|GIA

1.00ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1428718547

Certificate GIA 1428718547

Diamond specifications and retailer prices

From €917 EUR
As of November 6, 2026
Save €1,346 EUR (59%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €2,264 EUR at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct 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 1428718547. Listed at 14 retailers as of November 4, 2026, with prices from €917 to €2,264, a €1,346 spread on the same certified stone. MOH London lists it at €2,264. 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

1.00
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1428718547
Dimensions5.22 × 5.22 × 4.14 mm
L/W Ratio1.00
Key to symbols
Crystal, Feather, Cloud, Needle, Indented Natural, Natural
Top View
5.22 mm5.22 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1428718547
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 79.3%

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: €2,264 EUR|Low: €917 EUR|High: €2,282 EUR|Avg: €1,437 EUR|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9€917 EUR
Retailer 10€1,183 EUR
Retailer 2€1,201 EUR
Retailer 8€1,239 EUR
Retailer 5€1,279 EUR
Retailer 3€1,335 EUR
Retailer 6€1,359 EUR
Retailer 7€1,512 EUR
Retailer 11€1,616 EUR
Retailer 4€1,718 EUR
MOH London€2,264 EUR

35 data points across 11 retailers

14 retailers€917 EUR to €2,264 EUR

A
Cheapest Retailer
-
€917 EUR
B+
Retailer 2
-
€1,148 EUR
View
Retailer 3
-
€1,159 EUR
View
Price last confirmed 59 days ago
B+
Retailer 4
-
€1,183 EUR
View
Final sale: no returns
A
Retailer 5
-
€1,201 EUR
View
Retailer 6
-
€1,239 EUR
View
Price last confirmed 9 days ago
B+
Retailer 7
-
€1,279 EUR
View
B+
Retailer 8
-
€1,335 EUR
View
B+
Retailer 9
-
€1,355 EUR
View
B+
Retailer 10
-
€1,359 EUR
View
B+
Retailer 11
-
€1,512 EUR
View
Retailer 12
-
€1,616 EUR
View
Price last confirmed 33 days ago
B+
Retailer 13
-
€1,718 EUR
View
Most Expensive
B
MOH London
B3C613D10 · Nov 4
€2,264 EUR
£1,990 GBP
View
13 more retailers have this diamond
Prices start from €917 EURSave up to €1,346 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
1.00ct Cushion
€917 EUR