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Cushion|Lab Grown|IGI

1.68ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG618440527

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG618440527

Diamond specifications and retailer prices

From $1,390 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $1,390 USD 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 1.68ct lab-grown cushion diamond

This 1.68ct 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 LG618440527 or 618440527. 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

1.68
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618440527
Dimensions8.45 × 6.11 × 4.15 mm
L/W Ratio1.38
Girdle conditionFaceted
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
8.45 mm6.11 mm1.68 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618440527
Side View
Table 61.0%Crown 35.8°Girdle: THN-STKPavilion 39.1°Culet: NoneDepth 67.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: $1,390 USD|Low: $484 USD|High: $1,880 USD|Avg: $970 USD|-4.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
April 14, 2026
Retailer 6$484 USD
Retailer 2$700 USD
Retailer 5$847 USD
Retailer 3$919 USD
Retailer 7$938 USD
Brilliant Earth$1,390 USD
Retailer 4$1,880 USD

36 data points across 7 retailers

1 retailer

B
Brilliant Earth
9124065Y · Nov 2
$1,390 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
1.68ct Cushion
$1,390 USD