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Cushion|Lab Grown|IGI

1.56ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG546218813

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG546218813

Diamond specifications and retailer prices

From HK$1,671 HKD
$213 USD
As of October 28, 2026
Save HK$8,214 HKD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$9,885 HKD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.56ct lab-grown cushion diamond

This 1.56ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG546218813 or 546218813. Listed at 13 retailers as of October 28, 2026, with prices from HK$1,671 to HK$9,885, a HK$8,214 spread on the same certified stone. Brilliant Earth lists it at HK$9,885. 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

1.56
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG546218813
Dimensions6.49 × 6.37 × 4.23 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
6.49 mm6.37 mm1.56 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG546218813
Side View
Table 61.0%Crown 37.9°Girdle: MED-STKPavilion 31.3°Culet: NoneDepth 66.4%

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 28
Current: HK$9,885 HKD|Low: HK$1,671 HKD|High: HK$10,669 HKD|Avg: HK$4,437 HKD|-7.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 9HK$1,671 HKD
Retailer 7HK$1,859 HKD
Retailer 3HK$2,510 HKD
Retailer 2HK$3,064 HKD
Retailer 4HK$3,368 HKD
Retailer 10HK$3,716 HKD
Retailer 8HK$4,487 HKD
Retailer 5HK$4,699 HKD
Retailer 6HK$8,728 HKD
Brilliant EarthHK$9,885 HKD

42 data points across 10 retailers

13 retailersHK$1,671 HKD to HK$9,885 HKD

A
Cheapest Retailer
-
HK$1,671 HKD
$213 USD
Final sale: no returns
A
Retailer 2
-
HK$1,859 HKD
$237 USD
View
B+
Retailer 3
-
HK$2,510 HKD
$320 USD
View
A
Retailer 4
-
HK$3,064 HKD
€372 EUR
View
A
Retailer 5
-
HK$3,368 HKD
£338 GBP
View
A
Retailer 6
-
HK$3,716 HKD
$474 USD
View
A
Retailer 7
-
HK$3,742 HKD
$477 USD
View
B+
Retailer 8
-
HK$4,487 HKD
$572 USD
View
B+
Retailer 9
-
HK$4,699 HKD
$599 USD
View
B+
Retailer 10
-
HK$6,392 HKD
$815 USD
View
B
Retailer 11
-
HK$8,728 HKD
£876 GBP
View
B
Retailer 12
-
HK$9,136 HKD
$1,165 USD
View
Most Expensive
B
Brilliant Earth
10789467A · Oct 28
HK$9,885 HKD
$1,260 USD
View
12 more retailers have this diamond
Prices start from HK$1,671 HKDSave up to HK$8,214 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
1.56ct Cushion
HK$1,671 HKD