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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG529245314

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG529245314

Diamond specifications and retailer prices

From $278 USD
As of October 30, 2026
Save $962 USD (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,240 USD at MOH London · As of October 29, 2026
View at MOH London

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 LG529245314 or 529245314. Listed at 12 retailers as of October 29, 2026, with prices from $278 to $1,240, a $962 spread on the same certified stone. MOH London lists it at $1,240. 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 angle36.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG529245314
Dimensions6.77 × 6.56 × 4.45 mm
L/W Ratio1.03
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
6.77 mm6.56 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG529245314
Side View
Table 62.0%Crown 36.7°Girdle: MED-THKPavilion 40.5°Culet: NoneDepth 67.8%

Caratlytics Score

How it works →
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: $1,240 USD|Low: $198 USD|High: $1,250 USD|Avg: $636 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 11$278 USD
Retailer 9$308 USD
Retailer 5$344 USD
Retailer 10$415 USD
Retailer 3$504 USD
Retailer 7$557 USD
Retailer 12$557 USD
Retailer 6$585 USD
Retailer 8$773 USD
Retailer 4$1,041 USD
Retailer 2$1,130 USD
MOH London$1,240 USD

41 data points across 12 retailers

12 retailers$278 USD to $1,240 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
B+
Retailer 8
-
$585 USD
£461 GBP
View
B+
Retailer 9
-
$773 USD
View
B
Retailer 10
-
$1,041 USD
View
B
Retailer 11
-
$1,130 USD
View
Most Expensive
B
MOH London
LG529245314 · Oct 29
$1,240 USD
£976 GBP
View
11 more retailers have this diamond
Prices start from $278 USDSave up to $962 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