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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 $1,708 AUD
$1,200 USD
As of October 29, 2026
1 retailer carries this diamond
Only listing: $1,708 AUD 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 29, 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
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Price History

Last verified: Oct 29
Current: $1,708 AUD|Low: $575 AUD|High: $2,690 AUD|Avg: $1,477 AUD|-9.1%
Brilliant Earth
Retailer 2
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April 14, 2026
Retailer 4$583 AUD
Retailer 13$747 AUD
Retailer 2$815 AUD
Retailer 7$1,112 AUD
Retailer 9$1,119 AUD
Retailer 8$1,253 AUD
Retailer 11$1,374 AUD
Retailer 12$1,403 AUD
Retailer 5$1,527 AUD
Retailer 6$1,680 AUD
Brilliant Earth$1,708 AUD
Retailer 3$1,752 AUD
Retailer 10$2,039 AUD

55 data points across 13 retailers

1 retailer

B
Brilliant Earth
14233907A · Oct 29
$1,708 AUD
$1,200 USD
View

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B
1.78ct Cushion
$1,708 AUD