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Cushion|Lab Grown|IGI

5.15ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG650411212

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG650411212

Diamond specifications and retailer prices

From €937 EUR
$1,051 USD
As of November 1, 2026
Save €2,647 EUR (74%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €3,584 EUR at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 5.15ct lab-grown cushion diamond

This 5.15ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG650411212 or 650411212. Listed at 9 retailers as of November 1, 2026, with prices from €937 to €3,584, a €2,647 spread on the same certified stone. Brilliant Earth lists it at €3,584. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

5.15
Carat
F
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650411212
Dimensions11.72 × 9.32 × 6.18 mm
L/W Ratio1.26
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.72 mm9.32 mm5.15 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650411212
Side View
Table 66.0%Crown 30°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 66.3%

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: €3,584 EUR|Low: €606 EUR|High: €6,963 EUR|Avg: €1,702 EUR|-48.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7€606 EUR
Retailer 6€638 EUR
Retailer 8€937 EUR
Retailer 5€941 EUR
Retailer 2€945 EUR
Retailer 4€981 EUR
Retailer 9€996 EUR
Retailer 10€1,197 EUR
Retailer 3€2,531 EUR
Brilliant Earth€3,584 EUR

36 data points across 10 retailers

9 retailers€937 EUR to €3,584 EUR

Retailer 1
-
€606 EUR
$680 USD
Price last confirmed 22 days ago
B+
Retailer 2
-
€937 EUR
$1,051 USD
View
B+
Retailer 3
-
€941 EUR
$1,055 USD
View
A
Retailer 4
-
€945 EUR
£834 GBP
View
A
Retailer 5
-
€981 EUR
View
B+
Retailer 6
-
€996 EUR
$1,117 USD
View
B+
Retailer 7
-
€1,197 EUR
$1,343 USD
View
B
Retailer 8
-
€2,531 EUR
£2,235 GBP
View
Most Expensive
B
Brilliant Earth
11882709A · Nov 2
€3,584 EUR
$4,020 USD
View
8 more retailers have this diamond
Prices start from €937 EURSave up to €2,647 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
5.15ct Cushion
€937 EUR