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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG775629456

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

Certificate IGI LG775629456

Diamond specifications and retailer prices

From $254 SGD
$199 USD
As of October 30, 2026
Save $1,190 SGD (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,445 SGD at Brilliant Earth · As of October 31, 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 LG775629456 or 775629456. Listed at 12 retailers as of October 30, 2026, with prices from $254 to $1,445, a $1,190 spread on the same certified stone. Brilliant Earth lists it at $1,445. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.1°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775629456
Dimensions6.71 × 6.60 × 4.07 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm6.60 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG775629456
Side View
Table 65.0%Crown 32.1°Girdle: MED-STKPavilion 34.6°Culet: NoneDepth 61.7%

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: $1,445 SGD|Low: $254 SGD|High: $1,611 SGD|Avg: $690 SGD|-9.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 10$254 SGD
Retailer 3$299 SGD
Retailer 11$500 SGD
Retailer 5$505 SGD
Retailer 6$522 SGD
Retailer 4$525 SGD
Retailer 8$611 SGD
Retailer 9$614 SGD
Retailer 7$707 SGD
Retailer 12$974 SGD
Retailer 2$1,315 SGD
Brilliant Earth$1,445 SGD

45 data points across 12 retailers

12 retailers$254 SGD to $1,445 SGD

A
Cheapest Retailer
-
$254 SGD
$199 USD
Final sale: no returns
Retailer 2
-
$299 SGD
$234 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
$500 SGD
$391 USD
View
A
Retailer 4
-
$505 SGD
£311 GBP
View
A
Retailer 5
-
$522 SGD
€389 EUR
View
Retailer 6
-
$525 SGD
£323 GBP
View
Price last confirmed 18 days ago
A
Retailer 7
-
$611 SGD
$478 USD
View
A
Retailer 8
-
$614 SGD
$480 USD
View
B+
Retailer 9
-
$707 SGD
$553 USD
View
B+
Retailer 10
-
$974 SGD
$762 USD
View
B
Retailer 11
-
$1,315 SGD
£810 GBP
View
Most Expensive
B
Brilliant Earth
17807477A · Oct 31
$1,445 SGD
$1,130 USD
View
11 more retailers have this diamond
Prices start from $254 SGDSave up to $1,190 SGD

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
$254 SGD