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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 $224 USD
As of October 30, 2026
Save $1,246 USD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,470 USD 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 $224 to $1,470, a $1,246 spread on the same certified stone. Brilliant Earth lists it at $1,470. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,470 USD|Low: $132 USD|High: $1,570 USD|Avg: $683 USD|-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$132 USD
Retailer 13$224 USD
Retailer 11$248 USD
Retailer 7$335 USD
Retailer 2$408 USD
Retailer 14$502 USD
Retailer 3$559 USD
Retailer 12$585 USD
Retailer 10$635 USD
Retailer 6$852 USD
Retailer 9$1,045 USD
Retailer 8$1,163 USD
Retailer 4$1,195 USD
Brilliant Earth$1,470 USD

26 data points across 14 retailers

13 retailers$224 USD to $1,470 USD

A
Cheapest Retailer
-
$224 USD
Final sale: no returns
A
Retailer 2
-
$248 USD
View
B+
Retailer 3
-
$335 USD
View
A
Retailer 4
-
$408 USD
€389 EUR
View
A
Retailer 5
-
$502 USD
View
A
Retailer 6
-
$559 USD
View
A
Retailer 7
-
$585 USD
View
B+
Retailer 8
-
$635 USD
View
B+
Retailer 9
-
$852 USD
View
Retailer 10
-
$1,045 USD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$1,163 USD
£916 GBP
View
B
Retailer 12
-
$1,195 USD
View
Most Expensive
B
Brilliant Earth
9518221A · Oct 29
$1,470 USD
View
12 more retailers have this diamond
Prices start from $224 USDSave up to $1,246 USD

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
$224 USD