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Cushion|Lab Grown|IGI

1.38ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG618405771

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG618405771

Diamond specifications and retailer prices

From €259 EUR
£229 GBP
As of October 27, 2026
Save €1,141 EUR (81%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €1,400 EUR at Do Amore Diamonds · As of October 27, 2026
View at Do Amore Diamonds

About this 1.38ct lab-grown cushion diamond

This 1.38ct 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 LG618405771 or 618405771. Listed at 6 retailers as of October 27, 2026, with prices from €259 to €1,400, a €1,141 spread on the same certified stone. Do Amore Diamonds lists it at €1,400. 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

1.38
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618405771
Dimensions6.48 × 6.38 × 4.20 mm
L/W Ratio1.02
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
6.48 mm6.38 mm1.38 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618405771
Side View
Table 61.0%Crown 34.4°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 65.8%

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: €1,400 EUR|Low: €163 EUR|High: €1,400 EUR|Avg: €643 EUR
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 27, 2026
Retailer 7€163 EUR
Retailer 2€259 EUR
Retailer 5€326 EUR
Retailer 6€658 EUR
Retailer 4€749 EUR
Retailer 3€932 EUR
Do Amore Diamonds€1,400 EUR

34 data points across 7 retailers

6 retailers€259 EUR to €1,400 EUR

A
Cheapest Retailer
-
€259 EUR
£229 GBP
Retailer 2
-
€326 EUR
$366 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
€658 EUR
$738 USD
View
Retailer 4
-
€749 EUR
$840 USD
View
Price last confirmed 7 days ago
Retailer 5
-
€932 EUR
£823 GBP
View
Price last confirmed 7 days ago
Most Expensive
B
Do Amore Diamonds
27-B543F295B · Oct 27
€1,400 EUR
$1,570 USD
View
5 more retailers have this diamond
Prices start from €259 EURSave up to €1,141 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
1.38ct Cushion
€259 EUR