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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG665409036

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG665409036

Diamond specifications and retailer prices

From $938 AUD
As of November 5, 2026
Save $5,334 AUD (85%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,272 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG665409036 or 665409036. Listed at 20 retailers as of November 4, 2026, with prices from $938 to $6,272, a $5,334 spread on the same certified stone. Brilliant Earth lists it at $6,272. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665409036
Dimensions7.60 × 6.17 × 4.10 mm
L/W Ratio1.23
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
7.60 mm6.17 mm1.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665409036
Side View
Table 64.0%Crown 34.2°Girdle: ThickPavilion 36.9°Culet: NoneDepth 66.5%

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 5
Current: $6,272 AUD|Low: $924 AUD|High: $6,272 AUD|Avg: $2,565 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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 5, 2026
Retailer 2$938 AUD
Retailer 5$1,033 AUD
Retailer 18$1,219 AUD
Retailer 4$1,336 AUD
Retailer 3$1,578 AUD
Retailer 6$1,589 AUD
Retailer 12$1,599 AUD
Retailer 15$1,776 AUD
Retailer 13$1,809 AUD
Retailer 14$2,376 AUD
Retailer 17$2,409 AUD
Retailer 9$3,019 AUD
Retailer 11$3,289 AUD
Retailer 8$3,347 AUD
Retailer 7$3,453 AUD
Retailer 10$3,495 AUD
Retailer 19$3,813 AUD
Retailer 16$4,489 AUD
Brilliant Earth$6,272 AUD

37 data points across 19 retailers

20 retailers$938 AUD to $6,272 AUD

A
Cheapest Retailer
-
$938 AUD
Final sale: no returns
Retailer 2
-
$1,033 AUD
View
Price last confirmed 20 days ago
A
Retailer 3
-
$1,219 AUD
View
A
Retailer 4
-
$1,336 AUD
View
A
Retailer 5
-
$1,578 AUD
View
A
Retailer 6
-
$1,589 AUD
View
A
Retailer 7
-
$1,599 AUD
View
A
Retailer 8
-
$1,776 AUD
View
A
Retailer 9
-
$1,809 AUD
View
B+
Retailer 10
-
$2,376 AUD
View
B+
Retailer 11
-
$2,409 AUD
View
B+
Retailer 12
-
$3,019 AUD
View
B
Retailer 13
-
$3,289 AUD
View
B
Retailer 14
-
$3,347 AUD
View
B
Retailer 15
-
$3,453 AUD
View
Retailer 16
-
$3,495 AUD
View
Price last confirmed 28 days ago
B
Retailer 17
-
$3,588 AUD
View
Retailer 18
-
$3,813 AUD
View
Price last confirmed 17 days ago
B
Retailer 19
-
$4,489 AUD
View
Most Expensive
B
Brilliant Earth
14720552A · Nov 4
$6,272 AUD
$4,400 USD
View
19 more retailers have this diamond
Prices start from $938 AUDSave up to $5,334 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
1.51ct Cushion
$938 AUD