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Cushion|Lab Grown|IGI

1.63ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG494183935

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG494183935

Diamond specifications and retailer prices

From $286 SGD
$224 USD
As of October 30, 2026
Save $1,593 SGD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,879 SGD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.63ct lab-grown cushion diamond

This 1.63ct 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 LG494183935 or 494183935. Listed at 13 retailers as of October 29, 2026, with prices from $286 to $1,879, a $1,593 spread on the same certified stone. Brilliant Earth lists it at $1,879. 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

1.63
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG494183935
Dimensions6.72 × 6.52 × 4.41 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Top View
6.72 mm6.52 mm1.63 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG494183935
Side View
Table 59.0%Crown 32.1°Girdle: THN-STKPavilion 34.9°Culet: NoneDepth 67.6%

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: $1,879 SGD|Low: $168 SGD|High: $2,007 SGD|Avg: $873 SGD|-6.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 5$168 SGD
Retailer 13$286 SGD
Retailer 11$317 SGD
Retailer 7$428 SGD
Retailer 2$522 SGD
Retailer 14$642 SGD
Retailer 3$715 SGD
Retailer 12$748 SGD
Retailer 10$812 SGD
Retailer 6$1,089 SGD
Retailer 9$1,336 SGD
Retailer 8$1,487 SGD
Retailer 4$1,527 SGD
Brilliant Earth$1,879 SGD

26 data points across 14 retailers

13 retailers$286 SGD to $1,879 SGD

A
Cheapest Retailer
-
$286 SGD
$224 USD
Final sale: no returns
A
Retailer 2
-
$317 SGD
$248 USD
View
B+
Retailer 3
-
$428 SGD
$335 USD
View
A
Retailer 4
-
$522 SGD
€389 EUR
View
A
Retailer 5
-
$642 SGD
$502 USD
View
A
Retailer 6
-
$715 SGD
$559 USD
View
A
Retailer 7
-
$748 SGD
$585 USD
View
B+
Retailer 8
-
$812 SGD
$635 USD
View
B+
Retailer 9
-
$1,089 SGD
$852 USD
View
Retailer 10
-
$1,336 SGD
$1,045 USD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$1,487 SGD
£916 GBP
View
B
Retailer 12
-
$1,527 SGD
$1,195 USD
View
Most Expensive
B
Brilliant Earth
9518221A · Oct 29
$1,879 SGD
$1,470 USD
View
12 more retailers have this diamond
Prices start from $286 SGDSave up to $1,593 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
1.63ct Cushion
$286 SGD