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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 $3,117 SGD
As of November 6, 2026
Save $3,934 SGD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,051 SGD 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 $3,117 to $7,051, a $3,934 spread on the same certified stone. MOH London lists it at $7,051. 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
Colour
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $7,051 SGD|Low: $3,117 SGD|High: $7,853 SGD|Avg: $4,799 SGD|-10.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$3,117 SGD
Retailer 7$3,890 SGD
Retailer 2$4,101 SGD
Retailer 4$4,339 SGD
Retailer 6$4,568 SGD
Retailer 8$4,655 SGD
Retailer 3$5,043 SGD
MOH London$7,051 SGD

39 data points across 8 retailers

8 retailers$3,117 SGD to $7,051 SGD

A
Cheapest Retailer
-
$3,117 SGD
A
Retailer 2
-
$3,890 SGD
View
A
Retailer 3
-
$4,101 SGD
View
A
Retailer 4
-
$4,339 SGD
View
A
Retailer 5
-
$4,568 SGD
View
B+
Retailer 6
-
$4,655 SGD
View
A
Retailer 7
-
$5,043 SGD
View
Most Expensive
B
MOH London
CA5457909 · Nov 4
$7,051 SGD
£4,332 GBP
View
7 more retailers have this diamond
Prices start from $3,117 SGDSave up to $3,934 SGD

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
$3,117 SGD