CaratHunter
Plans
Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1232955452

Certificate GIA 1232955452

Diamond specifications and retailer prices

From $2,432 USD
As of November 6, 2026
Save $3,070 USD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $5,502 USD 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 $2,432 to $5,502, a $3,070 spread on the same certified stone. MOH London lists it at $5,502. 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: $5,502 USD|Low: $2,432 USD|High: $6,128 USD|Avg: $3,744 USD|-10.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$2,432 USD
Retailer 7$3,035 USD
Retailer 2$3,200 USD
Retailer 4$3,386 USD
Retailer 6$3,564 USD
Retailer 8$3,632 USD
Retailer 3$3,935 USD
MOH London$5,502 USD

39 data points across 8 retailers

8 retailers$2,432 USD to $5,502 USD

A
Cheapest Retailer
-
$2,432 USD
A
Retailer 2
-
$3,035 USD
View
A
Retailer 3
-
$3,200 USD
View
A
Retailer 4
-
$3,386 USD
View
A
Retailer 5
-
$3,564 USD
View
B+
Retailer 6
-
$3,632 USD
View
A
Retailer 7
-
$3,935 USD
View
Most Expensive
B
MOH London
CA5457909 · Nov 4
$5,502 USD
£4,332 GBP
View
7 more retailers have this diamond
Prices start from $2,432 USDSave up to $3,070 USD

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
$2,432 USD