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Cushion|Lab Grown|IGI

1.66ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG515218930

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG515218930

Diamond specifications and retailer prices

From $946 AUD
$663 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $946 AUD 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 1.66ct lab-grown cushion diamond

This 1.66ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG515218930 or 515218930. 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

1.66
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG515218930
Dimensions6.65 × 6.56 mm
L/W Ratio1.01
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
6.65 mm6.56 mm1.66 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG515218930
Side View
Table 59.5%Crown 36.1°Girdle: MED-THKPavilion 32.9°Culet: NoneDepth 66.2%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: $946 AUD|Low: $910 AUD|High: $1,167 AUD|Avg: $1,008 AUD|-18.9%
September 23, 2026
B2C Jewels$946 AUD

3 data points across 1 retailer

1 retailer

B+
B2C Jewels
20596534 · Nov 2
$946 AUD
$663 USD
View

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B+
1.66ct Cushion
$946 AUD