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Marquise|Lab Grown|IGI

1.50ct I SI1 Marquise Lab Grown Diamond

ID • I/SI1 • IGI LG436045811

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436045811

Diamond specifications and retailer prices

From $1,441 AUD
$1,010 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $1,441 AUD 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045811 or 436045811. Listed at a single retailer as of November 2, 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045811
Dimensions10.88 × 6.02 × 3.86 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
10.88 mm6.02 mm1.50 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436045811
Side View
Table 60.5%Crown 36.4°Girdle: STK-THKPavilion 40.9°Culet: NoneDepth 64.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,441 AUD|Low: $1,370 AUD|High: $6,196 AUD|Avg: $3,619 AUD|-43.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
June 13, 2026
Brilliant Earth$1,441 AUD
Retailer 2$1,551 AUD
Retailer 5$2,390 AUD
Retailer 8$2,631 AUD
Retailer 6$2,957 AUD
Retailer 3$3,998 AUD
Retailer 4$4,769 AUD
Retailer 7$6,141 AUD

36 data points across 8 retailers

1 retailer

B+
Brilliant Earth
19761241A · Nov 2
$1,441 AUD
$1,010 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
$1,441 AUD