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Marquise|Lab Grown|IGI

3.50ct F SI2 Marquise Lab Grown Diamond

ID • F/SI2 • IGI LG594317557

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG594317557

Diamond specifications and retailer prices

From €430 EUR
$480 USD
As of October 30, 2026
Save €2,408 EUR (85%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €2,837 EUR at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.5ct lab-grown marquise diamond

This 3.5ct lab-grown marquise sits in the three to five carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG594317557 or 594317557. Listed at 7 retailers as of October 30, 2026, with prices from €430 to €2,837, a €2,408 spread on the same certified stone. Brilliant Earth lists it at €2,837. 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

3.50
Carat
F
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG594317557
Dimensions15.81 × 8.14 × 4.88 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizeNone
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
15.81 mm8.14 mm3.50 ctF / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG594317557
Side View
Table 61.0%Crown 33°GirdlePavilion 39.9°Culet: NoneDepth 60.0%

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: Oct 30
Current: €2,837 EUR|Low: €421 EUR|High: €3,795 EUR|Avg: €1,762 EUR|-25.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 6€430 EUR
Retailer 4€482 EUR
Retailer 5€831 EUR
Retailer 3€1,432 EUR
Retailer 7€1,547 EUR
Retailer 2€2,468 EUR
Brilliant Earth€2,837 EUR

17 data points across 7 retailers

7 retailers€430 EUR to €2,837 EUR

A
Cheapest Retailer
-
€430 EUR
$480 USD
A
Retailer 2
-
€482 EUR
$538 USD
View
B+
Retailer 3
-
€831 EUR
$928 USD
View
B+
Retailer 4
-
€1,432 EUR
$1,600 USD
View
B+
Retailer 5
-
€1,547 EUR
$1,728 USD
View
B
Retailer 6
-
€2,468 EUR
£2,171 GBP
View
Most Expensive
B
Brilliant Earth
7921813Y · Oct 30
€2,837 EUR
$3,170 USD
View
6 more retailers have this diamond
Prices start from €430 EURSave up to €2,408 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
3.50ct Marquise
€430 EUR