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Cushion|Lab Grown|IGI

1.66ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG532262653

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG532262653

Diamond specifications and retailer prices

From HK$2,370 HKD
$302 USD
As of November 1, 2026
Save HK$10,106 HKD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$12,475 HKD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.66ct lab-grown cushion diamond

This 1.66ct 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 LG532262653 or 532262653. Listed at 14 retailers as of November 1, 2026, with prices from HK$2,370 to HK$12,475, a HK$10,106 spread on the same certified stone. Brilliant Earth lists it at HK$12,475. 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

1.66
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG532262653
Dimensions7.05 × 6.85 × 4.46 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
7.05 mm6.85 mm1.66 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG532262653
Side View
Table 65.0%Crown 35.4°Girdle: MED-THKPavilion 38.9°Culet: NoneDepth 65.1%

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: Nov 1
Current: HK$12,475 HKD|Low: HK$2,370 HKD|High: HK$12,554 HKD|Avg: HK$5,608 HKD|-0.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 3HK$2,370 HKD
Retailer 11HK$2,621 HKD
Retailer 8HK$2,919 HKD
Retailer 12HK$3,515 HKD
Retailer 9HK$3,531 HKD
Retailer 2HK$4,561 HKD
Retailer 7HK$4,663 HKD
Retailer 4HK$4,723 HKD
Retailer 6HK$6,708 HKD
Retailer 10HK$8,474 HKD
Retailer 5HK$10,513 HKD
Brilliant EarthHK$12,475 HKD

42 data points across 12 retailers

14 retailersHK$2,370 HKD to HK$12,475 HKD

A
Cheapest Retailer
-
HK$2,370 HKD
$302 USD
Final sale: no returns
Retailer 2
-
HK$2,621 HKD
$334 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
HK$2,919 HKD
£293 GBP
View
B+
Retailer 4
-
HK$3,515 HKD
$448 USD
View
A
Retailer 5
-
HK$3,531 HKD
$450 USD
View
A
Retailer 6
-
HK$4,561 HKD
£458 GBP
View
A
Retailer 7
-
HK$4,663 HKD
€566 EUR
View
B+
Retailer 8
-
HK$4,723 HKD
$602 USD
View
B+
Retailer 9
-
HK$4,723 HKD
$602 USD
View
B+
Retailer 10
-
HK$6,708 HKD
$855 USD
View
Retailer 11
-
HK$8,474 HKD
$1,080 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
HK$8,830 HKD
$1,125 USD
View
B
Retailer 13
-
HK$10,513 HKD
£1,055 GBP
View
Most Expensive
B
Brilliant Earth
11259540A · Nov 2
HK$12,475 HKD
$1,590 USD
View
13 more retailers have this diamond
Prices start from HK$2,370 HKDSave up to HK$10,106 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
1.66ct Cushion
HK$2,370 HKD