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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 $525 USD
As of October 29, 2026
Save $4,125 USD (89%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,650 USD 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 $525 to $4,650, a $4,125 spread on the same certified stone. Brilliant Earth lists it at $4,650. 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
Color
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: $4,650 USD|Low: $525 USD|High: $4,650 USD|Avg: $1,582 USD
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 29, 2026
Retailer 11$525 USD
Retailer 8$581 USD
Retailer 7$810 USD
Retailer 14$810 USD
Retailer 16$839 USD
Retailer 10$880 USD
Retailer 2$961 USD
Retailer 13$999 USD
Retailer 15$1,414 USD
Retailer 4$1,415 USD
Retailer 6$1,803 USD
Retailer 9$1,843 USD
Retailer 3$1,940 USD
Retailer 17$2,085 USD
Retailer 12$2,148 USD
Retailer 5$2,920 USD
Brilliant Earth$4,650 USD

35 data points across 17 retailers

20 retailers$525 USD to $4,650 USD

A
Cheapest Retailer
-
$525 USD
Final sale: no returns
A
Retailer 2
-
$581 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
$666 USD
HK$5,200 HKD
View
Price last confirmed 55 days ago
A
Retailer 4
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$810 USD
View
A
Retailer 5
-
$810 USD
View
A
Retailer 6
-
$839 USD
View
A
Retailer 7
-
$880 USD
€838 EUR
View
A
Retailer 8
-
$961 USD
£757 GBP
View
A
Retailer 9
-
$999 USD
ZAR 16,141 ZAR
View
A
Retailer 10
-
$1,414 USD
View
A
Retailer 11
-
$1,415 USD
A$2,177 AUD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$1,803 USD
View
B+
Retailer 13
-
$1,843 USD
SGD 2,491 SGD
View
Price last confirmed 18 days ago
B+
Retailer 14
-
$1,940 USD
View
B+
Retailer 15
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$1,974 USD
View
B+
Retailer 16
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$2,085 USD
View
B+
Retailer 17
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$2,148 USD
£1,691 GBP
View
B+
Retailer 18
-
$2,920 USD
View
B
Retailer 19
-
$2,970 USD
View
Price last confirmed 15 days ago
Most Expensive
B
Brilliant Earth
12605322A · Oct 29
$4,650 USD
View
19 more retailers have this diamond
Prices start from $525 USDSave up to $4,125 USD

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
$525 USD