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Cushion|Lab Grown|IGI

1.80ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436045240

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436045240

Diamond specifications and retailer prices

From €394 EUR
$442 USD
As of November 1, 2026
Save €1,318 EUR (77%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €1,712 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1.8ct lab-grown cushion diamond

This 1.8ct lab-grown cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045240 or 436045240. Listed at 9 retailers as of November 1, 2026, with prices from €394 to €1,712, a €1,318 spread on the same certified stone. MOH London lists it at €1,712. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045240
Dimensions7.06 × 7.00 × 4.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.06 mm7.00 mm1.80 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045240
Side View
Table 63.5%Crown 35.1°Girdle: STK-VTKPavilion 40.7°Culet: NoneDepth 66.6%

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 1
Current: €1,712 EUR|Low: €386 EUR|High: €1,732 EUR|Avg: €770 EUR|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8€394 EUR
Retailer 5€438 EUR
Retailer 6€501 EUR
Retailer 3€504 EUR
Retailer 2€585 EUR
Retailer 7€665 EUR
Retailer 4€695 EUR
Retailer 9€1,441 EUR
MOH London€1,712 EUR

38 data points across 9 retailers

9 retailers€394 EUR to €1,712 EUR

A
Cheapest Retailer
-
€394 EUR
$442 USD
Final sale: no returns
Retailer 2
-
€438 EUR
$491 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
€501 EUR
$562 USD
View
A
Retailer 4
-
€504 EUR
$565 USD
View
A
Retailer 5
-
€585 EUR
£517 GBP
View
B+
Retailer 6
-
€665 EUR
$746 USD
View
B+
Retailer 7
-
€695 EUR
$779 USD
View
B
Retailer 8
-
€1,441 EUR
$1,616 USD
View
Most Expensive
B
MOH London
LG436045240 · Nov 1
€1,712 EUR
£1,512 GBP
View
8 more retailers have this diamond
Prices start from €394 EURSave up to €1,318 EUR

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
€394 EUR