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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 $428 USD
As of October 30, 2026
Save $3,322 USD (89%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,750 USD 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 24, 2026, with prices from $428 to $3,750, a $3,322 spread on the same certified stone. Brilliant Earth lists it at $3,750. 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
Color
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

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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 30
Current: $3,320 USD|Low: $428 USD|High: $3,870 USD|Avg: $1,517 USD|-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 30, 2026
Retailer 6$428 USD
Retailer 12$557 USD
Retailer 5$653 USD
Retailer 17$720 USD
Retailer 18$731 USD
Retailer 2$757 USD
Retailer 13$866 USD
Retailer 16$903 USD
Retailer 15$958 USD
Retailer 4$1,073 USD
Retailer 14$1,223 USD
Retailer 10$1,539 USD
Retailer 11$1,722 USD
Retailer 7$1,772 USD
Retailer 3$1,781 USD
Retailer 9$1,939 USD
Retailer 8$2,875 USD
Brilliant Earth$3,320 USD
Retailer 19$3,410 USD

28 data points across 19 retailers

22 retailers$428 USD to $3,750 USD

A
Cheapest Retailer
-
$428 USD
Final sale: no returns
A
Retailer 2
-
$557 USD
£439 GBP
View
A
Retailer 3
-
$653 USD
HK$5,100 HKD
View
A
Retailer 4
-
$720 USD
View
A
Retailer 5
-
$731 USD
View
A
Retailer 6
-
$757 USD
View
A
Retailer 7
-
$866 USD
£682 GBP
View
A
Retailer 8
-
$903 USD
ZAR 14,581 ZAR
View
A
Retailer 9
-
$958 USD
€912 EUR
View
A
Retailer 10
-
$1,073 USD
View
A
Retailer 11
-
$1,223 USD
A$1,882 AUD
View
Retailer 12
-
$1,539 USD
£1,212 GBP
View
Price last confirmed 9 days ago
B+
Retailer 13
-
$1,722 USD
View
B+
Retailer 14
-
$1,772 USD
View
B+
Retailer 15
-
$1,781 USD
View
Retailer 16
-
$1,939 USD
£1,527 GBP
View
Price last confirmed 9 days ago
Retailer 17
-
$2,745 USD
View
Price last confirmed 25 days ago
Retailer 18
-
$2,875 USD
View
Price last confirmed 9 days ago
B
Retailer 19
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$3,200 USD
£2,520 GBP
View
B
Retailer 20
-
$3,320 USD
View
B
Retailer 21
-
$3,410 USD
View
Most Expensive
B
Brilliant Earth
15616671A · Oct 24
$3,750 USD
View
21 more retailers have this diamond
Prices start from $428 USDSave up to $3,322 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
$428 USD