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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG598394110

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG598394110

Diamond specifications and retailer prices

From $991 AUD
As of November 4, 2026
Save $5,267 AUD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $6,258 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 LG598394110 or 598394110. Listed at 16 retailers as of November 4, 2026, with prices from $991 to $6,258, a $5,267 spread on the same certified stone. Brilliant Earth lists it at $6,258. 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 angle33.5°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598394110
Dimensions8.07 × 6.05 × 4.09 mm
L/W Ratio1.33
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
8.07 mm6.05 mm1.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598394110
Side View
Table 60.0%Crown 33.5°Girdle: MED-STKPavilion 36.9°Culet: NoneDepth 67.6%

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: $6,258 AUD|Low: $939 AUD|High: $6,258 AUD|Avg: $2,185 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 12$991 AUD
Retailer 4$1,041 AUD
Retailer 13$1,113 AUD
Retailer 3$1,205 AUD
Retailer 5$1,341 AUD
Retailer 10$1,581 AUD
Retailer 6$1,611 AUD
Retailer 9$1,788 AUD
Retailer 8$2,282 AUD
Retailer 11$2,423 AUD
Retailer 7$3,155 AUD
Retailer 2$4,506 AUD
Brilliant Earth$6,258 AUD

43 data points across 13 retailers

16 retailers$991 AUD to $6,258 AUD

A
Cheapest Retailer
-
$991 AUD
Final sale: no returns
A
Retailer 2
-
$1,205 AUD
View
A
Retailer 3
-
$1,341 AUD
View
A
Retailer 4
-
$1,394 AUD
View
A
Retailer 5
-
$1,579 AUD
View
A
Retailer 6
-
$1,581 AUD
View
A
Retailer 7
-
$1,611 AUD
View
A
Retailer 8
-
$1,788 AUD
View
B+
Retailer 9
-
$2,282 AUD
View
B+
Retailer 10
-
$2,423 AUD
View
B+
Retailer 11
-
$3,019 AUD
View
B+
Retailer 12
-
$3,155 AUD
View
B
Retailer 13
-
$3,367 AUD
View
B
Retailer 14
-
$3,441 AUD
View
B
Retailer 15
-
$4,506 AUD
View
Most Expensive
B
Brilliant Earth
11244208A · Nov 4
$6,258 AUD
$4,390 USD
View
15 more retailers have this diamond
Prices start from $991 AUDSave up to $5,267 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
$991 AUD