Cushion|Lab Grown|IGI

0.40ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG670407959

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG670407959

Diamond specifications and retailer prices

From $179 SGD
$140 USD
As of October 16, 2026
10 retailers carry this diamond
Most expensive: $823 SGD at Taylor and Hart · As of October 21, 2026
View at Taylor and Hart

About this 0.4ct lab-grown cushion diamond

This 0.4ct lab-grown cushion sits in the sub-half-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG670407959 or 670407959. Listed at 10 retailers as of October 16, 2026. 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

0.40
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670407959
Dimensions5.02 × 3.83 × 2.54 mm
L/W Ratio1.31
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.02 mm3.83 mm0.40 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670407959
Side View
Table 61.0%Crown 37.4°Girdle: STK-THKPavilion 33.9°Culet: NoneDepth 66.3%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 16
Current: $359 SGD|Low: $143 SGD|High: $1,563 SGD|Avg: $441 SGD|+9.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Taylor and Hart
October 23, 2026
Retailer 12$152 SGD
Retailer 13$179 SGD
Retailer 2$253 SGD
Retailer 8$329 SGD
Retailer 11$333 SGD
Retailer 7$338 SGD
Retailer 1$359 SGD
Retailer 4$384 SGD
Retailer 5$440 SGD
Retailer 6$457 SGD
Retailer 3$506 SGD
Retailer 9$541 SGD
Taylor and Hart$823 SGD
Retailer 10$1,563 SGD

33 data points across 14 retailers

10 retailers$179 SGD to $823 SGD

Retailer 1
-
$179 SGD
$140 USD
Price last confirmed 15 days ago
Retailer 2
-
$253 SGD
$198 USD
View
Price last confirmed 10 days ago
Retailer 3
-
$333 SGD
$260 USD
View
Price last confirmed 10 days ago
Retailer 4
-
$338 SGD
£208 GBP
View
Price last confirmed 10 days ago
Retailer 5
-
$359 SGD
£221 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
$457 SGD
CA$497 CAD
View
Price last confirmed 9 days ago
Retailer 7
-
$506 SGD
£312 GBP
View
Price last confirmed 8 days ago
Retailer 8
-
$823 SGD
$644 USD
View
Price last confirmed 10 days ago
Most Expensive
Taylor and Hart
4O9Q8QZ · Oct 21
$823 SGD
$644 USD
View
Price last confirmed 10 days ago
8 more retailers have this diamond

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.

0.40ct Cushion
$179 SGD