CaratHunter
Plans
Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG843667687

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG843667687

Diamond specifications and retailer prices

From $744 AUD
As of November 4, 2026
Save $3,832 AUD (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,258 AUD at Brilliant Earth · As of October 15, 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 LG843667687 or 843667687. Listed at 13 retailers as of November 4, 2026, with a 515% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843667687
Dimensions8.82 × 5.59 × 3.79 mm
L/W Ratio1.58
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
8.82 mm5.59 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843667687
Side View
Table 58.0%Crown 33.2°Girdle: STK-VTKPavilion 32.1°Culet: NoneDepth 67.8%

Caratlytics Score

How it works →
A+
Exceptional
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: $4,034 AUD|Low: $744 AUD|High: $5,659 AUD|Avg: $2,296 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
November 5, 2026
Retailer 6$744 AUD
Retailer 9$919 AUD
Retailer 11$1,022 AUD
Retailer 7$1,150 AUD
Retailer 12$1,167 AUD
Retailer 5$1,644 AUD
Retailer 2$2,747 AUD
Retailer 4$3,206 AUD
Retailer 8$3,454 AUD
Retailer 3$3,585 AUD
Brilliant Earth$4,034 AUD
Retailer 10$4,576 AUD

22 data points across 12 retailers

13 retailers$744 AUD to $4,576 AUD

A+
Cheapest Retailer
-
$744 AUD
A
Retailer 2
-
$919 AUD
View
A
Retailer 3
-
$1,022 AUD
View
A
Retailer 4
-
$1,150 AUD
View
A
Retailer 5
-
$1,167 AUD
View
A
Retailer 6
-
$1,644 AUD
View
B+
Retailer 7
-
$2,747 AUD
View
Retailer 8
-
$3,206 AUD
View
Price last confirmed 20 days ago
B
Retailer 9
-
$3,454 AUD
View
Retailer 10
-
$3,585 AUD
View
Price last confirmed 17 days ago
B+
Retailer 11
-
$4,034 AUD
View
B
Retailer 12
-
$4,576 AUD
View
Most Expensive
Brilliant Earth
21768659A · Oct 15
$6,258 AUD
$4,390 USD
View
Price last confirmed 20 days ago
12 more retailers have this diamond
Prices start from $744 AUDSave up to $3,832 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
$744 AUD