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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 $385 SGD
$301 USD
As of November 1, 2026
Save $2,671 SGD (87%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,055 SGD at Do Amore Diamonds · As of November 1, 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 November 1, 2026, with prices from $385 to $3,055, a $2,671 spread on the same certified stone. Do Amore Diamonds lists it at $3,055. 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
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

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: Nov 1
Current: $3,055 SGD|Low: $385 SGD|High: $3,337 SGD|Avg: $1,282 SGD|-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
November 1, 2026
Retailer 7$385 SGD
Retailer 6$427 SGD
Retailer 3$505 SGD
Retailer 5$528 SGD
Retailer 10$562 SGD
Retailer 11$570 SGD
Retailer 2$829 SGD
Retailer 8$1,806 SGD
Retailer 4$1,900 SGD
Retailer 9$2,544 SGD
Do Amore Diamonds$3,055 SGD

40 data points across 11 retailers

12 retailers$385 SGD to $3,055 SGD

A
Cheapest Retailer
-
$385 SGD
$301 USD
Final sale: no returns
Retailer 2
-
$427 SGD
$334 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$505 SGD
$395 USD
View
Retailer 4
-
$528 SGD
£325 GBP
View
Price last confirmed 15 days ago
A
Retailer 5
-
$562 SGD
$440 USD
View
B+
Retailer 6
-
$570 SGD
$446 USD
View
A
Retailer 7
-
$633 SGD
$495 USD
View
B+
Retailer 8
-
$829 SGD
£511 GBP
View
B
Retailer 9
-
$1,726 SGD
$1,350 USD
View
B
Retailer 10
-
$1,806 SGD
$1,413 USD
View
B
Retailer 11
-
$1,900 SGD
£1,170 GBP
View
Most Expensive
B
Do Amore Diamonds
27-26C7668BD · Nov 1
$3,055 SGD
$2,390 USD
View
11 more retailers have this diamond
Prices start from $385 SGDSave up to $2,671 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
$385 SGD