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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 $608 AUD
$427 USD
As of October 30, 2026
Save $2,516 AUD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,123 AUD at Helzberg Diamonds · As of October 31, 2026
View at Helzberg Diamonds

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 11 retailers as of October 30, 2026, with prices from $608 to $3,123, a $2,516 spread on the same certified stone. Helzberg Diamonds lists it at $3,123. 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
Colour
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

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,123 AUD|Low: $608 AUD|High: $3,616 AUD|Avg: $1,551 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 11$608 AUD
Retailer 8$714 AUD
Retailer 4$883 AUD
Retailer 5$1,004 AUD
Retailer 7$1,072 AUD
Retailer 9$1,169 AUD
Retailer 2$1,209 AUD
Retailer 3$2,144 AUD
Retailer 10$2,219 AUD
Retailer 6$2,534 AUD
Helzberg Diamonds$3,123 AUD

3 data points across 11 retailers

11 retailers$608 AUD to $3,123 AUD

A
Cheapest Retailer
-
$608 AUD
$427 USD
Final sale: no returns
A
Retailer 2
-
$714 AUD
£395 GBP
View
A
Retailer 3
-
$883 AUD
$620 USD
View
A
Retailer 4
-
$1,004 AUD
$705 USD
View
A
Retailer 5
-
$1,072 AUD
$753 USD
View
A
Retailer 6
-
$1,169 AUD
$821 USD
View
A
Retailer 7
-
$1,209 AUD
£669 GBP
View
B
Retailer 8
-
$2,144 AUD
SGD 2,035 SGD
View
B
Retailer 9
-
$2,219 AUD
$1,559 USD
View
B
Retailer 10
-
$2,534 AUD
$1,780 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOJGMIGHJN · Oct 31
$3,123 AUD
$2,194 USD
View
10 more retailers have this diamond
Prices start from $608 AUDSave up to $2,516 AUD

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
$608 AUD