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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG547262691

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG547262691

Diamond specifications and retailer prices

From $278 USD
As of October 30, 2026
Save $972 USD (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,250 USD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG547262691 or 547262691. Listed at 12 retailers as of October 26, 2026, with prices from $278 to $1,250, a $972 spread on the same certified stone. Brilliant Earth lists it at $1,250. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.50
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG547262691
Dimensions7.71 × 6.18 × 4.06 mm
L/W Ratio1.25
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
7.71 mm6.18 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG547262691
Side View
Table 60.0%Crown 35.1°Girdle: MED-THKPavilion 38°Culet: NoneDepth 65.7%

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: Oct 30
Current: $1,250 USD|Low: $272 USD|High: $1,250 USD|Avg: $609 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9$278 USD
Retailer 7$308 USD
Retailer 3$344 USD
Retailer 8$415 USD
Retailer 4$557 USD
Retailer 10$557 USD
Retailer 2$580 USD
Retailer 6$773 USD
Retailer 5$1,240 USD
Brilliant Earth$1,250 USD

44 data points across 10 retailers

12 retailers$278 USD to $1,250 USD

A
Cheapest Retailer
-
$278 USD
Final sale: no returns
A
Retailer 2
-
$308 USD
View
A
Retailer 3
-
$344 USD
£270 GBP
View
B+
Retailer 4
-
$415 USD
View
A
Retailer 5
-
$504 USD
View
B+
Retailer 6
-
$557 USD
€530 EUR
View
B+
Retailer 7
-
$557 USD
View
A
Retailer 8
-
$580 USD
£457 GBP
View
B+
Retailer 9
-
$773 USD
View
B
Retailer 10
-
$1,041 USD
View
B
Retailer 11
-
$1,240 USD
£976 GBP
View
Most Expensive
B
Brilliant Earth
11260743A · Oct 26
$1,250 USD
View
11 more retailers have this diamond
Prices start from $278 USDSave up to $972 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
1.50ct Cushion
$278 USD