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Cushion|Lab Grown|IGI

1.66ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG729569332

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG729569332

Diamond specifications and retailer prices

From $1,002 AUD
$704 USD
As of November 1, 2026
Save $3,681 AUD (79%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,684 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.66ct lab-grown cushion diamond

This 1.66ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG729569332 or 729569332. Listed at 20 retailers as of October 31, 2026, with prices from $1,002 to $4,684, a $3,681 spread on the same certified stone. Brilliant Earth lists it at $4,684. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729569332
Dimensions7.93 × 6.21 × 4.31 mm
L/W Ratio1.28
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
7.93 mm6.21 mm1.66 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729569332
Side View
Table 58.0%Crown 35.8°Girdle: MED-VTKPavilion 40°Culet: NoneDepth 69.4%

Caratlytics Score

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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: Nov 1
Current: $4,684 AUD|Low: $1,002 AUD|High: $4,783 AUD|Avg: $2,471 AUD|-2.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 10$1,002 AUD
Retailer 4$1,041 AUD
Retailer 15$1,281 AUD
Retailer 7$1,398 AUD
Retailer 9$1,689 AUD
Retailer 2$1,729 AUD
Retailer 13$1,911 AUD
Retailer 11$2,366 AUD
Retailer 12$2,590 AUD
Retailer 14$2,698 AUD
Retailer 6$3,233 AUD
Retailer 3$3,353 AUD
Retailer 5$3,510 AUD
Retailer 8$4,383 AUD
Brilliant Earth$4,684 AUD

44 data points across 15 retailers

20 retailers$1,002 AUD to $4,684 AUD

A
Cheapest Retailer
-
$1,002 AUD
$704 USD
Final sale: no returns
Retailer 2
-
$1,041 AUD
$731 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$1,221 AUD
HK$6,700 HKD
View
A
Retailer 4
-
$1,281 AUD
$900 USD
View
A
Retailer 5
-
$1,398 AUD
$982 USD
View
A
Retailer 6
-
$1,492 AUD
$1,048 USD
View
A
Retailer 7
-
$1,689 AUD
€1,130 EUR
View
A
Retailer 8
-
$1,729 AUD
£956 GBP
View
A
Retailer 9
-
$1,875 AUD
$1,317 USD
View
A
Retailer 10
-
$1,911 AUD
ZAR 21,689 ZAR
View
B+
Retailer 11
-
$2,366 AUD
$1,662 USD
View
B+
Retailer 12
-
$2,590 AUD
View
Retailer 13
-
$2,698 AUD
$1,895 USD
View
Price last confirmed 11 days ago
B+
Retailer 14
-
$3,233 AUD
£1,788 GBP
View
B+
Retailer 15
-
$3,353 AUD
$2,355 USD
View
B+
Retailer 16
-
$3,510 AUD
SGD 3,332 SGD
View
B
Retailer 17
-
$3,591 AUD
$2,522 USD
View
B
Retailer 18
-
$3,652 AUD
$2,566 USD
View
B
Retailer 19
-
$4,383 AUD
£2,424 GBP
View
Most Expensive
B
Brilliant Earth
15964172A · Oct 31
$4,684 AUD
$3,290 USD
View
19 more retailers have this diamond
Prices start from $1,002 AUDSave up to $3,681 AUD

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
1.66ct Cushion
$1,002 AUD