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Cushion|Lab Grown|IGI

1.55ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG749588589

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG749588589

Diamond specifications and retailer prices

From $576 USD
HK$4,500 HKD
As of November 1, 2026
Save $2,334 USD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,910 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.55ct lab-grown cushion diamond

This 1.55ct 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 LG749588589 or 749588589. Listed at 10 retailers as of October 31, 2026, with prices from $576 to $2,910, a $2,334 spread on the same certified stone. Brilliant Earth lists it at $2,910. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle29.8°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749588589
Dimensions8.52 × 6.24 × 3.96 mm
L/W Ratio1.37
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
8.52 mm6.24 mm1.55 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749588589
Side View
Table 60.0%Crown 29.8°Girdle: MED-STKPavilion 36°Culet: NoneDepth 63.5%

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 1
Current: $2,910 USD|Low: $576 USD|High: $3,930 USD|Avg: $1,649 USD|-26.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 5$576 USD
Retailer 4$603 USD
Retailer 8$678 USD
Retailer 2$832 USD
Retailer 7$836 USD
Retailer 9$1,648 USD
Retailer 3$1,814 USD
Retailer 6$2,565 USD
Brilliant Earth$2,910 USD

41 data points across 9 retailers

10 retailers$576 USD to $2,910 USD

A
Cheapest Retailer
-
$576 USD
HK$4,500 HKD
A
Retailer 2
-
$603 USD
View
A
Retailer 3
-
$678 USD
View
A
Retailer 4
-
$832 USD
£655 GBP
View
A
Retailer 5
-
$836 USD
View
B+
Retailer 6
-
$1,648 USD
View
B+
Retailer 7
-
$1,814 USD
£1,428 GBP
View
Retailer 8
-
$2,485 USD
View
Price last confirmed 14 days ago
Retailer 9
-
$2,565 USD
View
Price last confirmed 14 days ago
Most Expensive
B
Brilliant Earth
20152624Y · Oct 31
$2,910 USD
View
9 more retailers have this diamond
Prices start from $576 USDSave up to $2,334 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
1.55ct Cushion
$576 USD