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Marquise|Lab Grown|IGI

1.50ct G SI1 Marquise Lab Grown Diamond

ID • G/SI1 • IGI LG510158603

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG510158603

Diamond specifications and retailer prices

From €1,020 EUR
$1,140 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: €1,020 EUR at Brilliant Earth
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 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 LG510158603 or 510158603. Listed at a single retailer as of October 31, 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

1.50
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG510158603
Dimensions11.26 × 5.98 × 3.73 mm
L/W Ratio1.88
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
11.26 mm5.98 mm1.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG510158603
Side View
Table 62.5%Crown 37.9°Girdle: STK-THKPavilion 39.3°Culet: NoneDepth 62.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: €1,020 EUR|Low: €1,020 EUR|High: €4,630 EUR|Avg: €2,726 EUR
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
September 25, 2026
Brilliant Earth€1,020 EUR
Retailer 4€1,548 EUR
Retailer 6€1,754 EUR
Retailer 9€2,163 EUR
Retailer 3€2,311 EUR
Retailer 5€2,504 EUR
Retailer 8€2,911 EUR
Retailer 7€4,445 EUR
Retailer 10€4,593 EUR
Retailer 2€4,630 EUR

6 data points across 10 retailers

1 retailer

B
Brilliant Earth
19748997A · Oct 31
€1,020 EUR
$1,140 USD
View

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
€1,020 EUR