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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG623451210

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG623451210

Diamond specifications and retailer prices

From $301 USD
As of October 30, 2026
Save $2,089 USD (87%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,390 USD at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

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 LG623451210 or 623451210. Listed at 12 retailers as of October 30, 2026, with prices from $301 to $2,390, a $2,089 spread on the same certified stone. Do Amore Diamonds lists it at $2,390. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623451210
Dimensions6.90 × 6.68 × 4.23 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
6.90 mm6.68 mm1.50 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623451210
Side View
Table 60.0%Crown 36.9°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 63.3%

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: $2,390 USD|Low: $301 USD|High: $2,610 USD|Avg: $1,007 USD|-8.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 7$301 USD
Retailer 6$334 USD
Retailer 3$395 USD
Retailer 5$413 USD
Retailer 10$440 USD
Retailer 11$446 USD
Retailer 2$654 USD
Retailer 8$1,413 USD
Retailer 4$1,486 USD
Retailer 9$1,990 USD
Do Amore Diamonds$2,390 USD

40 data points across 11 retailers

12 retailers$301 USD to $2,390 USD

A
Cheapest Retailer
-
$301 USD
Final sale: no returns
A
Retailer 2
-
$334 USD
View
A
Retailer 3
-
$395 USD
View
Retailer 4
-
$413 USD
£325 GBP
View
Price last confirmed 14 days ago
A
Retailer 5
-
$440 USD
View
B+
Retailer 6
-
$446 USD
View
A
Retailer 7
-
$495 USD
View
B+
Retailer 8
-
$654 USD
£515 GBP
View
B
Retailer 9
-
$1,350 USD
View
B
Retailer 10
-
$1,413 USD
View
B
Retailer 11
-
$1,486 USD
£1,170 GBP
View
Most Expensive
B
Do Amore Diamonds
27-26C7668BD · Oct 30
$2,390 USD
View
11 more retailers have this diamond
Prices start from $301 USDSave up to $2,089 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
$301 USD