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Cushion|Lab Grown|IGI

1.40ct D IF Cushion Lab Grown Diamond

VG • D/IF • IGI LG843612983

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG843612983

Diamond specifications and retailer prices

From $749 AUD
As of November 4, 2026
Save $2,680 AUD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,428 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.4ct lab-grown cushion diamond

This 1.4ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG843612983 or 843612983. Listed at 14 retailers as of November 4, 2026, with prices from $749 to $3,428, a $2,680 spread on the same certified stone. Brilliant Earth lists it at $3,428. 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

1.40
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843612983
Dimensions7.45 × 6.04 × 4.02 mm
L/W Ratio1.23
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
7.45 mm6.04 mm1.40 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843612983
Side View
Table 59.0%Crown 36.8°Girdle: MED-THKPavilion 36.7°Culet: NoneDepth 66.6%

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: Nov 4
Current: $3,428 AUD|Low: $749 AUD|High: $3,428 AUD|Avg: $1,701 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 3$749 AUD
Retailer 4$921 AUD
Retailer 9$1,053 AUD
Retailer 6$1,123 AUD
Retailer 2$1,166 AUD
Retailer 11$1,480 AUD
Retailer 12$1,496 AUD
Retailer 5$2,151 AUD
Retailer 13$2,508 AUD
Retailer 8$2,547 AUD
Retailer 10$2,991 AUD
Retailer 7$3,007 AUD
Brilliant Earth$3,428 AUD

15 data points across 13 retailers

14 retailers$749 AUD to $3,428 AUD

A
Cheapest Retailer
-
$749 AUD
A
Retailer 2
-
$921 AUD
View
A
Retailer 3
-
$1,053 AUD
View
A
Retailer 4
-
$1,123 AUD
View
A
Retailer 5
-
$1,166 AUD
View
B+
Retailer 6
-
$1,480 AUD
View
B+
Retailer 7
-
$1,496 AUD
View
B+
Retailer 8
-
$1,814 AUD
View
B+
Retailer 9
-
$2,151 AUD
View
B
Retailer 10
-
$2,508 AUD
View
B
Retailer 11
-
$2,547 AUD
View
B
Retailer 12
-
$2,991 AUD
View
B
Retailer 13
-
$3,007 AUD
View
Most Expensive
B
Brilliant Earth
22234405A · Nov 4
$3,428 AUD
$2,400 USD
View
13 more retailers have this diamond
Prices start from $749 AUDSave up to $2,680 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
1.40ct Cushion
$749 AUD