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Cushion|Lab Grown|IGI

1.38ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG623488097

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG623488097

Diamond specifications and retailer prices

From $295 SGD
$231 USD
As of October 30, 2026
Save $1,260 SGD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,556 SGD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.38ct lab-grown cushion diamond

This 1.38ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG623488097 or 623488097. Listed at 12 retailers as of October 30, 2026, with prices from $295 to $1,556, a $1,260 spread on the same certified stone. Reve Diamonds lists it at $1,556. 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

1.38
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.6°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623488097
Dimensions6.73 × 6.52 × 4.40 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
6.73 mm6.52 mm1.38 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623488097
Side View
Table 62.0%Crown 39.6°Girdle: MED-THKPavilion 41.2°Culet: NoneDepth 67.5%

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: $606 SGD|Low: $208 SGD|High: $2,058 SGD|Avg: $917 SGD|+5.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 1, 2026
Retailer 6$295 SGD
Retailer 2$568 SGD
Retailer 1$606 SGD
Retailer 4$623 SGD
Retailer 10$648 SGD
Retailer 9$718 SGD
Retailer 11$891 SGD
Retailer 5$1,087 SGD
Retailer 8$1,119 SGD
Retailer 3$1,124 SGD
Retailer 7$1,325 SGD
Reve Diamonds$1,556 SGD

44 data points across 12 retailers

12 retailers$295 SGD to $1,556 SGD

A
Cheapest Retailer
-
$295 SGD
$231 USD
Final sale: no returns
A
Retailer 2
-
$568 SGD
$444 USD
View
A
Retailer 3
-
$606 SGD
£373 GBP
View
A
Retailer 4
-
$623 SGD
€464 EUR
View
A
Retailer 5
-
$648 SGD
$507 USD
View
B+
Retailer 6
-
$718 SGD
$562 USD
View
B+
Retailer 7
-
$891 SGD
$697 USD
View
B+
Retailer 8
-
$1,087 SGD
$850 USD
View
Retailer 9
-
$1,119 SGD
$875 USD
View
Price last confirmed 10 days ago
B
Retailer 10
-
$1,124 SGD
$880 USD
View
B
Retailer 11
-
$1,325 SGD
£816 GBP
View
Most Expensive
B
Reve Diamonds
48E84B908 · Oct 30
$1,556 SGD
$1,217 USD
View
11 more retailers have this diamond
Prices start from $295 SGDSave up to $1,260 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
1.38ct Cushion
$295 SGD