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Cushion|Lab Grown|IGI

1.15ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG653439405

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG653439405

Diamond specifications and retailer prices

From €215 EUR
$240 USD
As of November 1, 2026
Save €1,271 EUR (86%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €1,844 EUR at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.15ct lab-grown cushion diamond

This 1.15ct lab-grown cushion sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG653439405 or 653439405. Listed at 10 retailers as of November 1, 2026, with a 592% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.15
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.1°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG653439405
Dimensions6.22 × 6.10 × 4.01 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.22 mm6.10 mm1.15 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG653439405
Side View
Table 62.0%Crown 31.1°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 65.7%

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 1
Current: €1,844 EUR|Low: €113 EUR|High: €1,844 EUR|Avg: €650 EUR
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 9€215 EUR
Retailer 7€238 EUR
Retailer 11€272 EUR
Retailer 5€299 EUR
Retailer 12€320 EUR
Retailer 8€488 EUR
Retailer 2€492 EUR
Retailer 4€518 EUR
Retailer 13€600 EUR
Retailer 3€954 EUR
Retailer 10€997 EUR
Retailer 6€1,052 EUR
Do Amore Diamonds€1,844 EUR

41 data points across 13 retailers

10 retailers€215 EUR to €1,486 EUR

A
Cheapest Retailer
-
€215 EUR
$240 USD
Final sale: no returns
Retailer 2
-
€238 EUR
$266 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
€272 EUR
$304 USD
View
A
Retailer 4
-
€320 EUR
$357 USD
View
B+
Retailer 5
-
€488 EUR
$545 USD
View
B+
Retailer 6
-
€492 EUR
£433 GBP
View
B
Retailer 7
-
€997 EUR
$1,113 USD
View
B
Retailer 8
-
€1,052 EUR
£925 GBP
View
B
Retailer 9
-
€1,486 EUR
$1,660 USD
View
Most Expensive
Do Amore Diamonds
27-FFC2DA70E · Nov 2
€1,844 EUR
$2,060 USD
View
Price under review
9 more retailers have this diamond
Prices start from €215 EURSave up to €1,271 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
1.15ct Cushion
€215 EUR