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Marquise|Lab Grown|IGI

3.12ct G SI1 Marquise Lab Grown Diamond

EX • G/SI1 • IGI LG546217117

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG546217117

Diamond specifications and retailer prices

From €1,329 EUR
$1,485 USD
As of November 1, 2026
1 retailer carries this diamond
Only listing: €1,329 EUR at B2C Jewels
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at B2C Jewels

About this 3.12ct lab-grown marquise diamond

This 3.12ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG546217117 or 546217117. Listed at a single retailer as of November 1, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

3.12
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG546217117
Dimensions15.17 × 7.62 mm
L/W Ratio1.99
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
15.17 mm7.62 mm3.12 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG546217117
Side View
Table 56.5%Crown 33.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 63.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 1
Current: €1,329 EUR|Low: €1,274 EUR|High: €1,636 EUR|Avg: €1,413 EUR|-18.8%
September 23, 2026
B2C Jewels€1,329 EUR

3 data points across 1 retailer

1 retailer

B
B2C Jewels
21172104 · Nov 1
€1,329 EUR
$1,485 USD
View

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B
3.12ct Marquise
€1,329 EUR