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Cushion|Lab Grown|IGI

1.40ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG591375663

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG591375663

Diamond specifications and retailer prices

From €262 EUR
£232 GBP
As of October 27, 2026
Save €1,155 EUR (82%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €1,418 EUR at Do Amore Diamonds · As of October 27, 2026
View at Do Amore Diamonds

About this 1.4ct lab-grown cushion diamond

This 1.4ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG591375663 or 591375663. Listed at 6 retailers as of October 27, 2026, with prices from €262 to €1,418, a €1,155 spread on the same certified stone. Do Amore Diamonds lists it at €1,418. 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

1.40
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591375663
Dimensions8.30 × 5.69 × 3.75 mm
L/W Ratio1.46
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.30 mm5.69 mm1.40 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591375663
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 65.9%

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: Oct 27
Current: €1,418 EUR|Low: €119 EUR|High: €1,498 EUR|Avg: €622 EUR|-5.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 27, 2026
Retailer 7€175 EUR
Retailer 2€262 EUR
Retailer 4€328 EUR
Retailer 10€373 EUR
Retailer 9€465 EUR
Retailer 8€561 EUR
Retailer 5€664 EUR
Retailer 6€767 EUR
Retailer 3€943 EUR
Do Amore Diamonds€1,418 EUR

18 data points across 10 retailers

6 retailers€262 EUR to €1,418 EUR

A
Cheapest Retailer
-
€262 EUR
£232 GBP
B+
Retailer 2
-
€328 EUR
$368 USD
View
B+
Retailer 3
-
€664 EUR
$744 USD
View
B+
Retailer 4
-
€767 EUR
$860 USD
View
B
Retailer 5
-
€943 EUR
£833 GBP
View
Most Expensive
B
Do Amore Diamonds
27-3AA3771D1 · Oct 27
€1,418 EUR
$1,590 USD
View
5 more retailers have this diamond
Prices start from €262 EURSave up to €1,155 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
1.40ct Cushion
€262 EUR