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Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1232955452

Certificate GIA 1232955452

Diamond specifications and retailer prices

From $3,421 CAD
As of November 6, 2026
Save $4,318 CAD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,739 CAD at MOH London · As of November 4, 2026
View at MOH London

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1232955452. Listed at 8 retailers as of November 4, 2026, with prices from $3,421 to $7,739, a $4,318 spread on the same certified stone. MOH London lists it at $7,739. 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

1.80
Carat
K
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle35.99°
OriginNatural
Grading LabGIA
CertificateGIA 1232955452
Dimensions8.05 × 6.31 × 4.33 mm
L/W Ratio1.28
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
8.05 mm6.31 mm1.80 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1232955452
Side View
Table 62.0%CrownGirdle: STK-VTKPavilion 35.99°Culet: NoneDepth 68.6%

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: $7,739 CAD|Low: $3,421 CAD|High: $8,619 CAD|Avg: $5,267 CAD|-10.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$3,421 CAD
Retailer 7$4,269 CAD
Retailer 2$4,501 CAD
Retailer 4$4,763 CAD
Retailer 6$5,013 CAD
Retailer 8$5,109 CAD
Retailer 3$5,535 CAD
MOH London$7,739 CAD

39 data points across 8 retailers

8 retailers$3,421 CAD to $7,739 CAD

A
Cheapest Retailer
-
$3,421 CAD
A
Retailer 2
-
$4,269 CAD
View
A
Retailer 3
-
$4,501 CAD
View
A
Retailer 4
-
$4,763 CAD
View
A
Retailer 5
-
$5,013 CAD
View
B+
Retailer 6
-
$5,109 CAD
View
A
Retailer 7
-
$5,535 CAD
View
Most Expensive
B
MOH London
CA5457909 · Nov 4
$7,739 CAD
£4,332 GBP
View
7 more retailers have this diamond
Prices start from $3,421 CADSave up to $4,318 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
1.80ct Cushion
$3,421 CAD