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Cushion|Natural|GIA

1.80ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 2566365562

Certificate GIA 2566365562

Diamond specifications and retailer prices

From $5,329 USD
As of November 2, 2026
Save $3,177 USD (37%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $8,506 USD at MOH London · As of November 1, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566365562. Listed at 5 retailers as of November 1, 2026, with prices from $5,329 to $8,506, a $3,177 spread on the same certified stone. MOH London lists it at $8,506. 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
I
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566365562
Dimensions8.00 × 6.19 × 4.17 mm
L/W Ratio1.29
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
8.00 mm6.19 mm1.80 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566365562
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.4%

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 2
Current: $8,506 USD|Low: $5,217 USD|High: $9,194 USD|Avg: $6,476 USD|-7.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 5$5,329 USD
Retailer 3$5,632 USD
Retailer 2$5,633 USD
Retailer 4$6,308 USD
MOH London$8,506 USD

32 data points across 5 retailers

5 retailers$5,329 USD to $8,506 USD

A
Cheapest Retailer
-
$5,329 USD
Final sale: no returns
A
Retailer 2
-
$5,632 USD
£4,435 GBP
View
A
Retailer 3
-
$5,633 USD
£4,435 GBP
View
B+
Retailer 4
-
$6,308 USD
€6,008 EUR
View
Most Expensive
B
MOH London
BF36AEE1F · Nov 1
$8,506 USD
£6,698 GBP
View
4 more retailers have this diamond
Prices start from $5,329 USDSave up to $3,177 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
$5,329 USD