Cushion|Lab Grown|IGI

1.54ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG816673339

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG816673339

Diamond specifications and retailer prices

From $552 USD
As of November 1, 2026
Save $2,013 USD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $4,610 USD at Brilliant Earth · As of September 28, 2026
View at Brilliant Earth

About this 1.54ct lab-grown cushion diamond

This 1.54ct 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 LG816673339 or 816673339. Listed at 16 retailers as of October 29, 2026, with a 365% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.54
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816673339
Dimensions6.81 × 6.63 × 4.36 mm
L/W Ratio1.03
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
6.81 mm6.63 mm1.54 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816673339
Side View
Table 61.0%Crown 36.7°Girdle: STK-VTKPavilion 37.9°Culet: NoneDepth 65.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $646 USD|Low: $552 USD|High: $2,582 USD|Avg: $1,415 USD|-0.5%
Retailer 1
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
Retailer 15
November 1, 2026
Retailer 15$552 USD
Retailer 1$646 USD
Retailer 14$735 USD
Retailer 7$820 USD
Retailer 4$845 USD
Retailer 9$916 USD
Retailer 8$1,016 USD
Retailer 13$1,050 USD
Retailer 5$1,111 USD
Retailer 11$1,424 USD
Retailer 6$1,992 USD
Retailer 3$2,128 USD
Retailer 2$2,286 USD
Retailer 10$2,474 USD
Retailer 12$2,565 USD

41 data points across 15 retailers

16 retailers$552 USD to $2,565 USD

A
Cheapest Retailer
-
$552 USD
Final sale: no returns
A
Retailer 2
-
$646 USD
£509 GBP
View
A
Retailer 3
-
$735 USD
View
A
Retailer 4
-
$820 USD
View
A
Retailer 5
-
$845 USD
View
A
Retailer 6
-
$916 USD
€872 EUR
View
A
Retailer 7
-
$1,016 USD
£800 GBP
View
A
Retailer 8
-
$1,050 USD
ZAR 16,969 ZAR
View
A
Retailer 9
-
$1,111 USD
View
A
Retailer 10
-
$1,424 USD
A$2,190 AUD
View
B+
Retailer 11
-
$1,992 USD
View
B+
Retailer 12
-
$2,128 USD
View
B+
Retailer 13
-
$2,286 USD
View
B+
Retailer 14
-
$2,474 USD
A$3,806 AUD
View
B+
Retailer 15
-
$2,565 USD
£2,020 GBP
View
Most Expensive
Brilliant Earth
20907181A · Sep 28
$4,610 USD
View
Price last confirmed 34 days ago
15 more retailers have this diamond
Prices start from $552 USDSave up to $2,013 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
1.54ct Cushion
$552 USD