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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 $1,233 NZD
As of November 4, 2026
Save $6,555 NZD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,788 NZD 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 $1,233 to $7,788, a $6,555 spread on the same certified stone. Brilliant Earth lists it at $7,788. 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

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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: $7,788 NZD|Low: $1,169 NZD|High: $7,788 NZD|Avg: $2,719 NZD
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$1,233 NZD
Retailer 4$1,295 NZD
Retailer 13$1,385 NZD
Retailer 3$1,499 NZD
Retailer 5$1,669 NZD
Retailer 10$1,967 NZD
Retailer 6$2,005 NZD
Retailer 9$2,225 NZD
Retailer 8$2,840 NZD
Retailer 11$3,016 NZD
Retailer 7$3,926 NZD
Retailer 2$5,608 NZD
Brilliant Earth$7,788 NZD

43 data points across 13 retailers

16 retailers$1,233 NZD to $7,788 NZD

A
Cheapest Retailer
-
$1,233 NZD
Final sale: no returns
A
Retailer 2
-
$1,499 NZD
View
A
Retailer 3
-
$1,669 NZD
View
A
Retailer 4
-
$1,735 NZD
View
A
Retailer 5
-
$1,966 NZD
View
A
Retailer 6
-
$1,967 NZD
View
A
Retailer 7
-
$2,005 NZD
View
A
Retailer 8
-
$2,225 NZD
View
B+
Retailer 9
-
$2,840 NZD
View
B+
Retailer 10
-
$3,016 NZD
View
B+
Retailer 11
-
$3,757 NZD
View
B+
Retailer 12
-
$3,926 NZD
View
B
Retailer 13
-
$4,190 NZD
View
B
Retailer 14
-
$4,282 NZD
View
B
Retailer 15
-
$5,608 NZD
View
Most Expensive
B
Brilliant Earth
11244208A · Nov 4
$7,788 NZD
$4,390 USD
View
15 more retailers have this diamond
Prices start from $1,233 NZDSave up to $6,555 NZD

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
$1,233 NZD