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Cushion|Lab Grown|IGI

1.78ct I VS1 Cushion Lab Grown Diamond

ID • I/VS1 • IGI LG662406596

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG662406596

Diamond specifications and retailer prices

From HK$9,415 HKD
$1,200 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: HK$9,415 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 1.78ct lab-grown cushion diamond

This 1.78ct lab-grown cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG662406596 or 662406596. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG662406596
Dimensions7.31 × 6.95 × 4.51 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.31 mm6.95 mm1.78 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG662406596
Side View
Table 61.0%Crown 34.8°Girdle: MED-THKPavilion 39.5°Culet: NoneDepth 64.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
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Price History

Last verified: Oct 31
Current: HK$9,415 HKD|Low: HK$3,172 HKD|High: HK$14,828 HKD|Avg: HK$8,139 HKD|-9.1%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
Retailer 6
Retailer 7
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Retailer 9
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Retailer 13
April 14, 2026
Retailer 4HK$3,214 HKD
Retailer 13HK$4,119 HKD
Retailer 2HK$4,490 HKD
Retailer 7HK$6,127 HKD
Retailer 9HK$6,167 HKD
Retailer 8HK$6,904 HKD
Retailer 11HK$7,571 HKD
Retailer 12HK$7,732 HKD
Retailer 5HK$8,419 HKD
Retailer 6HK$9,260 HKD
Brilliant EarthHK$9,415 HKD
Retailer 3HK$9,656 HKD
Retailer 10HK$11,239 HKD

55 data points across 13 retailers

1 retailer

B
Brilliant Earth
14233907A · Oct 31
HK$9,415 HKD
$1,200 USD
View

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B
1.78ct Cushion
HK$9,415 HKD