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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 HK$1,757 HKD
$224 USD
As of October 30, 2026
Save HK$9,776 HKD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$11,533 HKD 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 HK$1,757 to HK$11,533, a HK$9,776 spread on the same certified stone. Brilliant Earth lists it at HK$11,533. 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

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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: HK$11,533 HKD|Low: HK$1,034 HKD|High: HK$12,318 HKD|Avg: HK$5,358 HKD|-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 5HK$1,034 HKD
Retailer 13HK$1,757 HKD
Retailer 11HK$1,946 HKD
Retailer 7HK$2,628 HKD
Retailer 2HK$3,205 HKD
Retailer 14HK$3,939 HKD
Retailer 3HK$4,386 HKD
Retailer 12HK$4,590 HKD
Retailer 10HK$4,982 HKD
Retailer 6HK$6,683 HKD
Retailer 9HK$8,199 HKD
Retailer 8HK$9,127 HKD
Retailer 4HK$9,372 HKD
Brilliant EarthHK$11,533 HKD

26 data points across 14 retailers

13 retailersHK$1,757 HKD to HK$11,533 HKD

A
Cheapest Retailer
-
HK$1,757 HKD
$224 USD
Final sale: no returns
A
Retailer 2
-
HK$1,946 HKD
$248 USD
View
B+
Retailer 3
-
HK$2,628 HKD
$335 USD
View
A
Retailer 4
-
HK$3,205 HKD
€389 EUR
View
A
Retailer 5
-
HK$3,939 HKD
$502 USD
View
A
Retailer 6
-
HK$4,386 HKD
$559 USD
View
A
Retailer 7
-
HK$4,590 HKD
$585 USD
View
B+
Retailer 8
-
HK$4,982 HKD
$635 USD
View
B+
Retailer 9
-
HK$6,683 HKD
$852 USD
View
Retailer 10
-
HK$8,199 HKD
$1,045 USD
View
Price last confirmed 10 days ago
B
Retailer 11
-
HK$9,127 HKD
£916 GBP
View
B
Retailer 12
-
HK$9,372 HKD
$1,195 USD
View
Most Expensive
B
Brilliant Earth
9518221A · Oct 29
HK$11,533 HKD
$1,470 USD
View
12 more retailers have this diamond
Prices start from HK$1,757 HKDSave up to HK$9,776 HKD

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
HK$1,757 HKD