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Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6545639504

Certificate GIA 6545639504

Diamond specifications and retailer prices

From $7,160 CAD
As of November 5, 2026
Save $4,757 CAD (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $11,917 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 6545639504. Listed at 6 retailers as of November 4, 2026, with prices from $7,160 to $11,917, a $4,757 spread on the same certified stone. MOH London lists it at $11,917. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545639504
Dimensions7.80 × 6.01 × 4.26 mm
L/W Ratio1.30
Top View
7.80 mm6.01 mm1.80 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545639504
Side View
Table 59.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 70.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $11,917 CAD|Low: $6,302 CAD|High: $12,092 CAD|Avg: $8,248 CAD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7$6,411 CAD
Retailer 6$7,160 CAD
Retailer 4$7,252 CAD
Retailer 5$7,501 CAD
Retailer 2$8,441 CAD
Retailer 3$9,153 CAD
MOH London$11,917 CAD

43 data points across 7 retailers

6 retailers$7,160 CAD to $11,917 CAD

B+
Cheapest Retailer
-
$7,160 CAD
B+
Retailer 2
-
$7,252 CAD
View
Retailer 3
-
$7,501 CAD
View
Price last confirmed 8 days ago
B
Retailer 4
-
$8,441 CAD
View
B
Retailer 5
-
$9,153 CAD
View
Most Expensive
B
MOH London
1EB498011 · Nov 4
$11,917 CAD
£6,671 GBP
View
5 more retailers have this diamond
Prices start from $7,160 CADSave up to $4,757 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.

B+
1.80ct Cushion
$7,160 CAD