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Cushion|Lab Grown|IGI

1.38ct D IF Cushion Lab Grown Diamond

D/IF • IGI LG783670536

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG783670536

Diamond specifications and retailer prices

From $576 AUD
As of November 4, 2026
Save $2,824 AUD (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,400 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.38ct lab-grown cushion diamond

This 1.38ct 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) and certified by IGI LG783670536 or 783670536. Listed at 19 retailers as of November 4, 2026, with prices from $576 to $3,400, a $2,824 spread on the same certified stone. Brilliant Earth lists it at $3,400. 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

1.38
Carat
D
Colour
IF
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783670536
Dimensions6.55 × 6.37 × 4.30 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
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
6.55 mm6.37 mm1.38 ctD / IF
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783670536
Side View
Table 63.0%Crown 35°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 67.5%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $3,400 AUD|Low: $564 AUD|High: $3,700 AUD|Avg: $1,526 AUD|-8.1%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 5, 2026
Retailer 13$576 AUD
Retailer 12$657 AUD
Retailer 18$857 AUD
Retailer 17$1,004 AUD
Retailer 6$1,024 AUD
Retailer 5$1,103 AUD
Retailer 16$1,103 AUD
Retailer 2$1,143 AUD
Retailer 4$1,440 AUD
Retailer 11$1,561 AUD
Retailer 15$1,653 AUD
Retailer 8$2,114 AUD
Retailer 7$2,440 AUD
Retailer 9$2,481 AUD
Retailer 14$2,500 AUD
Retailer 10$2,521 AUD
Retailer 3$2,848 AUD
Brilliant Earth$3,400 AUD

26 data points across 18 retailers

19 retailers$576 AUD to $3,400 AUD

A
Cheapest Retailer
-
$576 AUD
Final sale: no returns
Retailer 2
-
$626 AUD
View
Price last confirmed 11 days ago
A
Retailer 3
-
$657 AUD
View
A
Retailer 4
-
$857 AUD
View
A
Retailer 5
-
$1,004 AUD
View
A
Retailer 6
-
$1,024 AUD
View
A
Retailer 7
-
$1,103 AUD
View
A
Retailer 8
-
$1,103 AUD
View
A
Retailer 9
-
$1,143 AUD
View
B+
Retailer 10
-
$1,440 AUD
View
B+
Retailer 11
-
$1,561 AUD
View
B+
Retailer 12
-
$1,653 AUD
View
B
Retailer 13
-
$2,114 AUD
View
B
Retailer 14
-
$2,440 AUD
View
B
Retailer 15
-
$2,481 AUD
View
B
Retailer 16
-
$2,500 AUD
View
B
Retailer 17
-
$2,521 AUD
View
B
Retailer 18
-
$2,848 AUD
View
Most Expensive
B
Brilliant Earth
18445978A · Nov 4
$3,400 AUD
$2,380 USD
View
18 more retailers have this diamond
Prices start from $576 AUDSave up to $2,824 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
1.38ct Cushion
$576 AUD