CaratHunter
Plans
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 $319 AUD
$224 USD
As of October 28, 2026
Save $1,772 AUD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,090 AUD at Brilliant Earth · As of October 28, 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 28, 2026, with prices from $319 to $2,090, a $1,772 spread on the same certified stone. Brilliant Earth lists it at $2,090. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $2,090 AUD|Low: $187 AUD|High: $2,232 AUD|Avg: $971 AUD|-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$187 AUD
Retailer 13$319 AUD
Retailer 11$353 AUD
Retailer 7$476 AUD
Retailer 2$581 AUD
Retailer 14$714 AUD
Retailer 3$795 AUD
Retailer 12$832 AUD
Retailer 10$903 AUD
Retailer 6$1,211 AUD
Retailer 9$1,486 AUD
Retailer 8$1,654 AUD
Retailer 4$1,698 AUD
Brilliant Earth$2,090 AUD

26 data points across 14 retailers

13 retailers$319 AUD to $2,090 AUD

A
Cheapest Retailer
-
$319 AUD
$224 USD
Final sale: no returns
A
Retailer 2
-
$353 AUD
$248 USD
View
B+
Retailer 3
-
$476 AUD
$335 USD
View
A
Retailer 4
-
$581 AUD
€389 EUR
View
A
Retailer 5
-
$714 AUD
$502 USD
View
A
Retailer 6
-
$795 AUD
$559 USD
View
A
Retailer 7
-
$832 AUD
$585 USD
View
B+
Retailer 8
-
$903 AUD
$635 USD
View
B+
Retailer 9
-
$1,211 AUD
$852 USD
View
B
Retailer 10
-
$1,486 AUD
$1,045 USD
View
Price last confirmed 8 days ago
B
Retailer 11
-
$1,654 AUD
£916 GBP
View
B
Retailer 12
-
$1,698 AUD
$1,195 USD
View
Most Expensive
B
Brilliant Earth
9518221A · Oct 28
$2,090 AUD
$1,470 USD
View
12 more retailers have this diamond
Prices start from $319 AUDSave up to $1,772 AUD

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
$319 AUD