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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 $397 NZD
$224 USD
As of October 30, 2026
Save $2,211 NZD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,608 NZD 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 $397 to $2,608, a $2,211 spread on the same certified stone. Brilliant Earth lists it at $2,608. 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: $2,608 NZD|Low: $234 NZD|High: $2,786 NZD|Avg: $1,212 NZD|-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$234 NZD
Retailer 13$397 NZD
Retailer 11$440 NZD
Retailer 7$594 NZD
Retailer 2$725 NZD
Retailer 14$891 NZD
Retailer 3$992 NZD
Retailer 12$1,038 NZD
Retailer 10$1,127 NZD
Retailer 6$1,511 NZD
Retailer 9$1,854 NZD
Retailer 8$2,064 NZD
Retailer 4$2,119 NZD
Brilliant Earth$2,608 NZD

26 data points across 14 retailers

13 retailers$397 NZD to $2,608 NZD

A
Cheapest Retailer
-
$397 NZD
$224 USD
Final sale: no returns
A
Retailer 2
-
$440 NZD
$248 USD
View
B+
Retailer 3
-
$594 NZD
$335 USD
View
A
Retailer 4
-
$725 NZD
€389 EUR
View
A
Retailer 5
-
$891 NZD
$502 USD
View
A
Retailer 6
-
$992 NZD
$559 USD
View
A
Retailer 7
-
$1,038 NZD
$585 USD
View
B+
Retailer 8
-
$1,127 NZD
$635 USD
View
B+
Retailer 9
-
$1,511 NZD
$852 USD
View
Retailer 10
-
$1,854 NZD
$1,045 USD
View
Price last confirmed 10 days ago
B
Retailer 11
-
$2,064 NZD
£916 GBP
View
B
Retailer 12
-
$2,119 NZD
$1,195 USD
View
Most Expensive
B
Brilliant Earth
9518221A · Oct 29
$2,608 NZD
$1,470 USD
View
12 more retailers have this diamond
Prices start from $397 NZDSave up to $2,211 NZD

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
$397 NZD