Cushion|Lab Grown|IGI

1.20ct E FL Cushion Lab Grown Diamond

VG • E/FL • IGI LG830620137

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG830620137

Diamond specifications and retailer prices

From $427 USD
As of October 29, 2026
Save $2,113 USD (83%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,540 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.2ct lab-grown cushion diamond

This 1.2ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG830620137 or 830620137. Listed at 4 retailers as of October 29, 2026, with prices from $427 to $2,540, a $2,113 spread on the same certified stone. Brilliant Earth lists it at $2,540. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
E
Color
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620137
Dimensions7.78 × 5.28 × 3.54 mm
L/W Ratio1.47
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.78 mm5.28 mm1.20 ctE / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620137
Side View
Table 62.0%Crown 35.5°Girdle: STK-VTKPavilion 38.2°Culet: NoneDepth 67.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: $2,540 USD|Low: $427 USD|High: $2,540 USD|Avg: $1,332 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 3$427 USD
Retailer 2$854 USD
Retailer 4$1,506 USD
Brilliant Earth$2,540 USD

1 data point across 4 retailers

4 retailers$427 USD to $2,540 USD

A
Cheapest Retailer
-
$427 USD
Final sale: no returns
A
Retailer 2
-
$854 USD
£672 GBP
View
B
Retailer 3
-
$1,506 USD
SGD 2,035 SGD
View
Most Expensive
B
Brilliant Earth
22348636A · Oct 29
$2,540 USD
View
3 more retailers have this diamond
Prices start from $427 USDSave up to $2,113 USD

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.

A
1.20ct Cushion
$427 USD