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Cushion|Lab Grown|IGI

1.77ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG671405868

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG671405868

Diamond specifications and retailer prices

From $747 AUD
$525 USD
As of October 29, 2026
Save $5,872 AUD (89%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,619 AUD at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG671405868 or 671405868. Listed at 20 retailers as of October 29, 2026, with prices from $747 to $6,619, a $5,872 spread on the same certified stone. Brilliant Earth lists it at $6,619. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.77
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG671405868
Dimensions8.08 × 6.39 × 4.49 mm
L/W Ratio1.26
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
8.08 mm6.39 mm1.77 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG671405868
Side View
Table 61.0%Crown 34.5°Girdle: MED-STKPavilion 38.8°Culet: NoneDepth 70.3%

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: Oct 29
Current: $6,619 AUD|Low: $747 AUD|High: $6,619 AUD|Avg: $2,312 AUD
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
October 30, 2026
Retailer 13$747 AUD
Retailer 8$827 AUD
Retailer 7$1,153 AUD
Retailer 16$1,153 AUD
Retailer 17$1,194 AUD
Retailer 12$1,252 AUD
Retailer 11$1,368 AUD
Retailer 15$1,422 AUD
Retailer 2$2,007 AUD
Retailer 4$2,014 AUD
Retailer 6$2,566 AUD
Retailer 9$2,624 AUD
Retailer 10$2,703 AUD
Retailer 3$2,968 AUD
Retailer 14$3,057 AUD
Retailer 5$4,156 AUD
Brilliant Earth$6,619 AUD

35 data points across 17 retailers

20 retailers$747 AUD to $6,619 AUD

A
Cheapest Retailer
-
$747 AUD
$525 USD
Final sale: no returns
Retailer 2
-
$827 AUD
$581 USD
View
Price last confirmed 17 days ago
Retailer 3
-
$947 AUD
HK$5,200 HKD
View
Price last confirmed 55 days ago
A
Retailer 4
-
$1,153 AUD
$810 USD
View
A
Retailer 5
-
$1,153 AUD
$810 USD
View
A
Retailer 6
-
$1,194 AUD
$839 USD
View
A
Retailer 7
-
$1,252 AUD
€838 EUR
View
A
Retailer 8
-
$1,368 AUD
£757 GBP
View
A
Retailer 9
-
$1,422 AUD
ZAR 16,141 ZAR
View
A
Retailer 10
-
$2,007 AUD
$1,410 USD
View
Retailer 11
-
$2,014 AUD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$2,566 AUD
$1,803 USD
View
Retailer 13
-
$2,624 AUD
SGD 2,491 SGD
View
Price last confirmed 18 days ago
B+
Retailer 14
-
$2,703 AUD
$1,899 USD
View
B+
Retailer 15
-
$2,810 AUD
$1,974 USD
View
B+
Retailer 16
-
$2,968 AUD
$2,085 USD
View
B+
Retailer 17
-
$3,057 AUD
£1,691 GBP
View
B+
Retailer 18
-
$4,156 AUD
$2,920 USD
View
Retailer 19
-
$4,227 AUD
$2,970 USD
View
Price last confirmed 15 days ago
Most Expensive
B
Brilliant Earth
12605322A · Oct 29
$6,619 AUD
$4,650 USD
View
19 more retailers have this diamond
Prices start from $747 AUDSave up to $5,872 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
$747 AUD