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Cushion|Lab Grown|IGI

1.64ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG526288476

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG526288476

Diamond specifications and retailer prices

From HK$1,765 HKD
$225 USD
As of October 30, 2026
Save HK$9,846 HKD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$11,612 HKD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.64ct lab-grown cushion diamond

This 1.64ct 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 LG526288476 or 526288476. Listed at 13 retailers as of October 29, 2026, with prices from HK$1,765 to HK$11,612, a HK$9,846 spread on the same certified stone. Brilliant Earth lists it at HK$11,612. 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

1.64
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle29.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526288476
Dimensions7.64 × 6.14 × 4.03 mm
L/W Ratio1.24
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.64 mm6.14 mm1.64 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526288476
Side View
Table 61.5%Crown 34.9°Girdle: MED-STKPavilion 29.2°Culet: NoneDepth 65.6%

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: HK$11,612 HKD|Low: HK$1,765 HKD|High: HK$12,318 HKD|Avg: HK$5,336 HKD|-5.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9HK$1,765 HKD
Retailer 6HK$2,652 HKD
Retailer 4HK$3,229 HKD
Retailer 3HK$3,594 HKD
Retailer 10HK$3,963 HKD
Retailer 8HK$4,598 HKD
Retailer 2HK$4,739 HKD
Retailer 7HK$8,199 HKD
Retailer 5HK$9,207 HKD
Brilliant EarthHK$11,612 HKD

44 data points across 10 retailers

13 retailersHK$1,765 HKD to HK$11,612 HKD

A
Cheapest Retailer
-
HK$1,765 HKD
$225 USD
Final sale: no returns
B+
Retailer 2
-
HK$2,652 HKD
$338 USD
View
A
Retailer 3
-
HK$3,229 HKD
€392 EUR
View
A
Retailer 4
-
HK$3,594 HKD
£361 GBP
View
A
Retailer 5
-
HK$3,963 HKD
$505 USD
View
A
Retailer 6
-
HK$4,441 HKD
$566 USD
View
A
Retailer 7
-
HK$4,598 HKD
$586 USD
View
B+
Retailer 8
-
HK$4,739 HKD
$604 USD
View
B+
Retailer 9
-
HK$6,716 HKD
$856 USD
View
Retailer 10
-
HK$8,199 HKD
$1,045 USD
View
Price last confirmed 10 days ago
B
Retailer 11
-
HK$9,207 HKD
£924 GBP
View
B
Retailer 12
-
HK$9,398 HKD
$1,198 USD
View
Most Expensive
B
Brilliant Earth
10788641A · Oct 29
HK$11,612 HKD
$1,480 USD
View
12 more retailers have this diamond
Prices start from HK$1,765 HKDSave up to HK$9,846 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
1.64ct Cushion
HK$1,765 HKD