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Marquise|Lab Grown|IGI

1.50ct G SI1 Marquise Lab Grown Diamond

EX • G/SI1 • IGI LG788659781

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG788659781

Diamond specifications and retailer prices

From €544 EUR
£480 GBP
As of November 2, 2026
Save €491 EUR (47%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €1,034 EUR at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.5ct lab-grown marquise diamond

This 1.5ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788659781 or 788659781. Listed at 2 retailers as of November 2, 2026, with prices from €544 to €1,034, a €491 spread on the same certified stone. Brilliant Earth lists it at €1,034. 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

1.50
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788659781
Dimensions11.28 × 5.97 × 3.83 mm
L/W Ratio1.89
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.28 mm5.97 mm1.50 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788659781
Side View
Table 63.0%Crown 35.3°Girdle: STK-THKPavilion 41°Culet: NoneDepth 64.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: €1,034 EUR|Low: €259 EUR|High: €1,034 EUR|Avg: €600 EUR
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
April 26, 2026
Retailer 4€259 EUR
Retailer 2€384 EUR
Retailer 3€493 EUR
Retailer 5€544 EUR
Brilliant Earth€1,034 EUR

5 data points across 5 retailers

2 retailers€544 EUR to €1,034 EUR

B+
Cheapest Retailer
-
€544 EUR
£480 GBP
Most Expensive
B
Brilliant Earth
18641082A · Nov 2
€1,034 EUR
$1,160 USD
View
1 more retailer has this diamond
Prices start from €544 EURSave up to €491 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.

B+
1.50ct Marquise
€544 EUR