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Cushion|Lab Grown|IGI

1.50ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG519254388

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG519254388

Diamond specifications and retailer prices

From $1,413 AUD
As of November 6, 2026
Save $2,072 AUD (59%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $4,837 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG519254388 or 519254388. Listed at 7 retailers as of November 5, 2026, with a 147% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle42.6°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519254388
Dimensions6.75 × 5.94 × 4.04 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeSmall Natural
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process.
Top View
6.75 mm5.94 mm1.50 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG519254388
Side View
Table 66.0%Crown 42.6°Girdle: VTK-ETKPavilion 34.6°Culet: SmallDepth 68.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,837 AUD|Low: $1,112 AUD|High: $4,894 AUD|Avg: $2,406 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$1,112 AUD
Retailer 6$1,413 AUD
Retailer 2$1,687 AUD
Retailer 4$1,710 AUD
Retailer 3$1,819 AUD
Retailer 7$3,486 AUD
MOH London$4,837 AUD

41 data points across 7 retailers

7 retailers$1,413 AUD to $3,486 AUD

Retailer 1
-
$1,112 AUD
Price last confirmed 22 days ago
B
Retailer 2
-
$1,413 AUD
View
B
Retailer 3
-
$1,687 AUD
View
B
Retailer 4
-
$1,710 AUD
View
B
Retailer 5
-
$1,819 AUD
View
C
Retailer 6
-
$3,486 AUD
View
Most Expensive
MOH London
LG519254388 · Nov 1
$4,837 AUD
£2,617 GBP
View
Price under review
6 more retailers have this diamond
Prices start from $1,413 AUDSave up to $2,072 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.

B
1.50ct Cushion
$1,413 AUD