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Cushion|Lab Grown|IGI

1.00ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG591375639

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG591375639

Diamond specifications and retailer prices

From HK$5,565 HKD
$710 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: HK$5,565 HKD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG591375639 or 591375639. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591375639
Dimensions7.41 × 5.20 × 3.51 mm
L/W Ratio1.43
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.41 mm5.20 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591375639
Side View
Table 59.0%Crown 33.8°Girdle: THN-MEDPavilion 41.2°Culet: NoneDepth 67.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: HK$5,565 HKD|Low: HK$2,171 HKD|High: HK$10,580 HKD|Avg: HK$4,229 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
May 22, 2026
Retailer 8HK$2,202 HKD
Retailer 3HK$2,296 HKD
Retailer 7HK$2,579 HKD
Retailer 10HK$3,049 HKD
Retailer 9HK$3,597 HKD
Retailer 5HK$3,644 HKD
Retailer 4HK$4,044 HKD
Retailer 2HK$5,228 HKD
Brilliant EarthHK$5,565 HKD
Retailer 6HK$10,345 HKD

61 data points across 10 retailers

1 retailer

B
Brilliant Earth
7771741Y · Nov 6
HK$5,565 HKD
$710 USD
View

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.

B
1.00ct Cushion
HK$5,565 HKD