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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG539216557

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG539216557

Diamond specifications and retailer prices

From HK$1,710 HKD
$218 USD
As of October 30, 2026
Save HK$7,704 HKD (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$9,415 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.59ct lab-grown cushion diamond

This 1.59ct 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 LG539216557 or 539216557. Listed at 12 retailers as of October 30, 2026, with prices from HK$1,710 to HK$9,415, a HK$7,704 spread on the same certified stone. Brilliant Earth lists it at HK$9,415. 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

1.59
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG539216557
Dimensions6.48 × 6.35 × 4.35 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
6.48 mm6.35 mm1.59 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG539216557
Side View
Table 57.5%Crown 37.3°Girdle: STK-VTKPavilion 32.9°Culet: NoneDepth 68.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: HK$9,415 HKD|Low: HK$1,710 HKD|High: HK$10,670 HKD|Avg: HK$4,817 HKD|-11.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 8HK$1,710 HKD
Retailer 6HK$2,573 HKD
Retailer 2HK$3,130 HKD
Retailer 3HK$3,456 HKD
Retailer 9HK$3,842 HKD
Retailer 7HK$4,535 HKD
Retailer 4HK$4,598 HKD
Retailer 5HK$8,968 HKD
Brilliant EarthHK$9,415 HKD

42 data points across 9 retailers

12 retailersHK$1,710 HKD to HK$9,415 HKD

A
Cheapest Retailer
-
HK$1,710 HKD
$218 USD
Final sale: no returns
B+
Retailer 2
-
HK$2,573 HKD
$328 USD
View
A
Retailer 3
-
HK$3,130 HKD
€380 EUR
View
A
Retailer 4
-
HK$3,456 HKD
£347 GBP
View
A
Retailer 5
-
HK$3,842 HKD
$490 USD
View
A
Retailer 6
-
HK$4,197 HKD
$535 USD
View
B+
Retailer 7
-
HK$4,535 HKD
$578 USD
View
A
Retailer 8
-
HK$4,598 HKD
$586 USD
View
B
Retailer 9
-
HK$6,552 HKD
$835 USD
View
B
Retailer 10
-
HK$8,968 HKD
£900 GBP
View
B
Retailer 11
-
HK$9,266 HKD
$1,181 USD
View
Most Expensive
B
Brilliant Earth
10789149A · Oct 31
HK$9,415 HKD
$1,200 USD
View
11 more retailers have this diamond
Prices start from HK$1,710 HKDSave up to HK$7,704 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
1.59ct Cushion
HK$1,710 HKD