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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 $1,440 CAD
As of November 6, 2026
Save $2,115 CAD (59%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,555 CAD 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 $1,440 to $3,555, a $2,115 spread on the same certified stone. MOH London lists it at $3,555. 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
Color
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: $3,555 CAD|Low: $1,440 CAD|High: $3,583 CAD|Avg: $2,256 CAD|-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$1,440 CAD
Retailer 10$1,858 CAD
Retailer 2$1,886 CAD
Retailer 8$1,945 CAD
Retailer 5$2,009 CAD
Retailer 3$2,096 CAD
Retailer 6$2,134 CAD
Retailer 7$2,374 CAD
Retailer 11$2,538 CAD
Retailer 4$2,698 CAD
MOH London$3,555 CAD

35 data points across 11 retailers

14 retailers$1,440 CAD to $3,555 CAD

A
Cheapest Retailer
-
$1,440 CAD
B+
Retailer 2
-
$1,803 CAD
View
Retailer 3
-
$1,820 CAD
View
Price last confirmed 58 days ago
B+
Retailer 4
-
$1,858 CAD
View
Final sale: no returns
A
Retailer 5
-
$1,886 CAD
View
Retailer 6
-
$1,945 CAD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$2,009 CAD
View
B+
Retailer 8
-
$2,096 CAD
View
B+
Retailer 9
-
$2,128 CAD
View
B+
Retailer 10
-
$2,134 CAD
View
B+
Retailer 11
-
$2,374 CAD
View
Retailer 12
-
$2,538 CAD
View
Price last confirmed 32 days ago
B+
Retailer 13
-
$2,698 CAD
View
Most Expensive
B
MOH London
B3C613D10 · Nov 4
$3,555 CAD
£1,990 GBP
View
13 more retailers have this diamond
Prices start from $1,440 CADSave up to $2,115 CAD

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
$1,440 CAD