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Cushion|Lab Grown|IGI

1.77ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG731533573

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG731533573

Diamond specifications and retailer prices

From $609 AUD
$428 USD
As of October 30, 2026
Save $4,245 AUD (87%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $5,339 AUD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.77ct lab-grown cushion diamond

This 1.77ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731533573 or 731533573. Listed at 22 retailers as of October 30, 2026, with a 697% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.77
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle29.8°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731533573
Dimensions8.25 × 6.61 × 4.38 mm
L/W Ratio1.25
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
8.25 mm6.61 mm1.77 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731533573
Side View
Table 60.0%Crown 29.8°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 66.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $4,726 AUD|Low: $609 AUD|High: $5,509 AUD|Avg: $2,164 AUD|-11.5%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 6$609 AUD
Retailer 15$793 AUD
Retailer 5$929 AUD
Retailer 13$975 AUD
Retailer 18$1,041 AUD
Retailer 14$1,078 AUD
Retailer 12$1,222 AUD
Retailer 17$1,285 AUD
Retailer 2$1,351 AUD
Retailer 4$1,528 AUD
Retailer 16$1,741 AUD
Retailer 10$2,191 AUD
Retailer 11$2,451 AUD
Retailer 7$2,522 AUD
Retailer 3$2,535 AUD
Retailer 9$2,761 AUD
Retailer 8$4,093 AUD
Brilliant Earth$4,726 AUD
Retailer 19$4,854 AUD

27 data points across 19 retailers

22 retailers$609 AUD to $4,854 AUD

A
Cheapest Retailer
-
$609 AUD
$428 USD
Final sale: no returns
A
Retailer 2
-
$793 AUD
£439 GBP
View
A
Retailer 3
-
$929 AUD
HK$5,100 HKD
View
A
Retailer 4
-
$975 AUD
$685 USD
View
A
Retailer 5
-
$1,041 AUD
$731 USD
View
A
Retailer 6
-
$1,078 AUD
$757 USD
View
A
Retailer 7
-
$1,222 AUD
£676 GBP
View
A
Retailer 8
-
$1,285 AUD
ZAR 14,581 ZAR
View
A
Retailer 9
-
$1,351 AUD
€904 EUR
View
A
Retailer 10
-
$1,528 AUD
$1,073 USD
View
A
Retailer 11
-
$1,741 AUD
View
Retailer 12
-
$2,191 AUD
£1,212 GBP
View
Price last confirmed 10 days ago
B+
Retailer 13
-
$2,451 AUD
$1,722 USD
View
B+
Retailer 14
-
$2,522 AUD
$1,772 USD
View
B+
Retailer 15
-
$2,535 AUD
$1,781 USD
View
Retailer 16
-
$2,761 AUD
£1,527 GBP
View
Price last confirmed 10 days ago
Retailer 17
-
$3,908 AUD
$2,745 USD
View
Price last confirmed 26 days ago
Retailer 18
-
$4,093 AUD
$2,875 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
$4,556 AUD
£2,520 GBP
View
B
Retailer 20
-
$4,726 AUD
$3,320 USD
View
B
Retailer 21
-
$4,854 AUD
$3,410 USD
View
Most Expensive
B
Brilliant Earth
15616671A · Oct 24
$5,339 AUD
$3,750 USD
View
Price last confirmed 7 days ago
21 more retailers have this diamond
Prices start from $609 AUDSave up to $4,245 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
1.77ct Cushion
$609 AUD