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Cushion|Lab Grown|IGI

1.64ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG526266176

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG526266176

Diamond specifications and retailer prices

From HK$2,346 HKD
$299 USD
As of October 30, 2026
Save HK$9,344 HKD (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$11,690 HKD at Brilliant Earth · As of October 30, 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 LG526266176 or 526266176. Listed at 13 retailers as of October 30, 2026, with prices from HK$2,346 to HK$11,690, a HK$9,344 spread on the same certified stone. Brilliant Earth lists it at HK$11,690. 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 angle35.7°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526266176
Dimensions6.98 × 6.76 × 4.43 mm
L/W Ratio1.03
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
6.98 mm6.76 mm1.64 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526266176
Side View
Table 65.5%Crown 35.7°Girdle: MED-VTKPavilion 39.3°Culet: NoneDepth 65.5%

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$11,690 HKD|Low: HK$1,663 HKD|High: HK$16,711 HKD|Avg: HK$6,089 HKD|-30.0%
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
October 31, 2026
Retailer 13HK$2,346 HKD
Retailer 11HK$2,597 HKD
Retailer 12HK$3,468 HKD
Retailer 8HK$3,491 HKD
Retailer 2HK$4,613 HKD
Retailer 4HK$4,621 HKD
Retailer 3HK$4,692 HKD
Retailer 6HK$4,931 HKD
Retailer 10HK$6,559 HKD
Retailer 9HK$8,434 HKD
Retailer 5HK$8,740 HKD
Retailer 7HK$10,452 HKD
Brilliant EarthHK$11,690 HKD

43 data points across 13 retailers

13 retailersHK$2,346 HKD to HK$11,690 HKD

A
Cheapest Retailer
-
HK$2,346 HKD
$299 USD
Final sale: no returns
A
Retailer 2
-
HK$2,597 HKD
$331 USD
View
B+
Retailer 3
-
HK$3,468 HKD
$442 USD
View
A
Retailer 4
-
HK$3,491 HKD
$445 USD
View
A
Retailer 5
-
HK$4,613 HKD
€560 EUR
View
A
Retailer 6
-
HK$4,621 HKD
$589 USD
View
A
Retailer 7
-
HK$4,692 HKD
$598 USD
View
A
Retailer 8
-
HK$4,931 HKD
£495 GBP
View
B+
Retailer 9
-
HK$6,559 HKD
$836 USD
View
Retailer 10
-
HK$8,434 HKD
$1,075 USD
View
Price last confirmed 10 days ago
B
Retailer 11
-
HK$8,740 HKD
$1,114 USD
View
B
Retailer 12
-
HK$10,452 HKD
£1,049 GBP
View
Most Expensive
B
Brilliant Earth
11226038A · Oct 30
HK$11,690 HKD
$1,490 USD
View
12 more retailers have this diamond
Prices start from HK$2,346 HKDSave up to HK$9,344 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$2,346 HKD