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Cushion|Lab Grown|IGI

1.65ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG541252029

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG541252029

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)
14 retailers carry this diamond
Most expensive: HK$11,612 HKD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.65ct lab-grown cushion diamond

This 1.65ct 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 LG541252029 or 541252029. Listed at 14 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

1.65
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle32.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG541252029
Dimensions6.74 × 6.63 × 4.20 mm
L/W Ratio1.02
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
6.74 mm6.63 mm1.65 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG541252029
Side View
Table 64.0%Crown 34.5°Girdle: MED-VTKPavilion 32.5°Culet: NoneDepth 63.3%

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$11,612 HKD|Low: HK$1,765 HKD|High: HK$12,396 HKD|Avg: HK$5,131 HKD|-6.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 11HK$1,765 HKD
Retailer 9HK$1,969 HKD
Retailer 7HK$2,668 HKD
Retailer 2HK$3,213 HKD
Retailer 4HK$3,586 HKD
Retailer 3HK$3,987 HKD
Retailer 10HK$4,613 HKD
Retailer 5HK$4,770 HKD
Retailer 8HK$8,199 HKD
Retailer 6HK$9,257 HKD
Brilliant EarthHK$11,612 HKD

44 data points across 11 retailers

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

A
Cheapest Retailer
-
HK$1,765 HKD
$225 USD
Final sale: no returns
A
Retailer 2
-
HK$1,969 HKD
$251 USD
View
B+
Retailer 3
-
HK$2,668 HKD
$340 USD
View
A
Retailer 4
-
HK$3,213 HKD
€390 EUR
View
A
Retailer 5
-
HK$3,586 HKD
£360 GBP
View
A
Retailer 6
-
HK$3,987 HKD
$508 USD
View
A
Retailer 7
-
HK$4,488 HKD
$572 USD
View
A
Retailer 8
-
HK$4,613 HKD
$588 USD
View
A
Retailer 9
-
HK$4,770 HKD
$608 USD
View
B+
Retailer 10
-
HK$6,749 HKD
$860 USD
View
Retailer 11
-
HK$8,199 HKD
$1,045 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
HK$9,257 HKD
£929 GBP
View
B
Retailer 13
-
HK$9,425 HKD
$1,201 USD
View
Most Expensive
B
Brilliant Earth
10789223A · Oct 29
HK$11,612 HKD
$1,480 USD
View
13 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
1.65ct Cushion
HK$1,765 HKD