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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG825661104

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG825661104

Diamond specifications and retailer prices

From $669 AUD
As of November 4, 2026
Save $3,394 AUD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,063 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 LG825661104 or 825661104. Listed at 17 retailers as of November 4, 2026, with prices from $669 to $4,063, a $3,394 spread on the same certified stone. Brilliant Earth lists it at $4,063. 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 angle34°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825661104
Dimensions8.63 × 5.81 × 3.73 mm
L/W Ratio1.49
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
8.63 mm5.81 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825661104
Side View
Table 60.0%Crown 34°Girdle: STK-THKPavilion 32.9°Culet: NoneDepth 64.2%

Caratlytics Score

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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: $4,063 AUD|Low: $634 AUD|High: $4,804 AUD|Avg: $1,879 AUD|-15.4%
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 5$634 AUD
Retailer 8$669 AUD
Retailer 4$962 AUD
Retailer 7$1,061 AUD
Retailer 11$1,093 AUD
Retailer 13$1,273 AUD
Retailer 9$1,490 AUD
Retailer 10$1,599 AUD
Retailer 6$1,971 AUD
Retailer 2$2,088 AUD
Retailer 12$2,479 AUD
Retailer 3$3,742 AUD
Brilliant Earth$4,063 AUD

34 data points across 13 retailers

17 retailers$669 AUD to $4,063 AUD

Retailer 1
-
$634 AUD
Price last confirmed 11 days ago
A
Retailer 2
-
$669 AUD
View
A
Retailer 3
-
$962 AUD
View
A
Retailer 4
-
$1,016 AUD
View
A
Retailer 5
-
$1,061 AUD
View
A
Retailer 6
-
$1,093 AUD
View
A
Retailer 7
-
$1,273 AUD
View
A
Retailer 8
-
$1,467 AUD
View
A
Retailer 9
-
$1,490 AUD
View
A
Retailer 10
-
$1,599 AUD
View
B+
Retailer 11
-
$1,971 AUD
View
B+
Retailer 12
-
$2,088 AUD
View
B+
Retailer 13
-
$2,097 AUD
View
B+
Retailer 14
-
$2,479 AUD
View
B
Retailer 15
-
$3,599 AUD
View
Retailer 16
-
$3,742 AUD
View
Price last confirmed 17 days ago
Most Expensive
B
Brilliant Earth
21612279A · Nov 4
$4,063 AUD
$2,850 USD
View
16 more retailers have this diamond
Prices start from $669 AUDSave up to $3,394 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
$669 AUD