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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 $695 USD
As of November 3, 2026
Save $3,695 USD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $4,390 USD at Brilliant Earth · As of November 3, 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 3, 2026, with prices from $695 to $4,390, a $3,695 spread on the same certified stone. Brilliant Earth lists it at $4,390. 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
Color
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 3
Current: $4,390 USD|Low: $659 USD|High: $4,390 USD|Avg: $1,489 USD
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
Retailer 14
November 3, 2026
Retailer 12$695 USD
Retailer 4$730 USD
Retailer 14$781 USD
Retailer 3$845 USD
Retailer 5$941 USD
Retailer 6$978 USD
Retailer 10$1,110 USD
Retailer 2$1,141 USD
Retailer 9$1,255 USD
Retailer 8$1,601 USD
Retailer 11$1,700 USD
Retailer 7$2,330 USD
Retailer 13$3,186 USD
Brilliant Earth$4,390 USD

43 data points across 14 retailers

16 retailers$695 USD to $4,390 USD

A
Cheapest Retailer
-
$695 USD
Final sale: no returns
A
Retailer 2
-
$845 USD
View
A
Retailer 3
-
$941 USD
View
A
Retailer 4
-
$978 USD
View
A
Retailer 5
-
$1,108 USD
View
A
Retailer 6
-
$1,110 USD
€1,057 EUR
View
A
Retailer 7
-
$1,141 USD
£899 GBP
View
A
Retailer 8
-
$1,255 USD
ZAR 20,268 ZAR
View
B+
Retailer 9
-
$1,601 USD
View
B+
Retailer 10
-
$1,700 USD
A$2,616 AUD
View
B+
Retailer 11
-
$2,118 USD
£1,668 GBP
View
B
Retailer 12
-
$2,330 USD
View
B
Retailer 13
-
$2,363 USD
View
B
Retailer 14
-
$2,414 USD
View
B
Retailer 15
-
$3,186 USD
£2,509 GBP
View
Most Expensive
B
Brilliant Earth
11244208A · Nov 3
$4,390 USD
View
15 more retailers have this diamond
Prices start from $695 USDSave up to $3,695 USD

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
$695 USD