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Cushion|Lab Grown|IGI

1.31ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG776609771

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG776609771

Diamond specifications and retailer prices

From $577 USD
As of October 30, 2026
Save $2,173 USD (79%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,750 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.31ct lab-grown cushion diamond

This 1.31ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG776609771 or 776609771. Listed at 18 retailers as of October 30, 2026, with prices from $577 to $2,750, a $2,173 spread on the same certified stone. Brilliant Earth lists it at $2,750. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG776609771
Dimensions7.51 × 5.71 × 3.94 mm
L/W Ratio1.32
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
7.51 mm5.71 mm1.31 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG776609771
Side View
Table 60.0%Crown 35.1°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 69.0%

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: $2,750 USD|Low: $577 USD|High: $3,000 USD|Avg: $1,430 USD|-5.5%
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
November 1, 2026
Retailer 17$577 USD
Retailer 10$673 USD
Retailer 16$704 USD
Retailer 15$740 USD
Retailer 3$852 USD
Retailer 12$973 USD
Retailer 4$975 USD
Retailer 11$990 USD
Retailer 6$991 USD
Retailer 14$1,098 USD
Retailer 13$1,557 USD
Retailer 9$1,855 USD
Retailer 18$1,859 USD
Retailer 8$2,024 USD
Retailer 5$2,079 USD
Retailer 7$2,200 USD
Retailer 2$2,667 USD
Brilliant Earth$2,750 USD

40 data points across 18 retailers

18 retailers$577 USD to $2,750 USD

A
Cheapest Retailer
-
$577 USD
Final sale: no returns
Retailer 2
-
$673 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$704 USD
HK$5,500 HKD
View
A
Retailer 4
-
$740 USD
View
A
Retailer 5
-
$852 USD
View
A
Retailer 6
-
$973 USD
€927 EUR
View
A
Retailer 7
-
$975 USD
View
A
Retailer 8
-
$990 USD
£779 GBP
View
A
Retailer 9
-
$991 USD
View
A
Retailer 10
-
$1,098 USD
ZAR 17,741 ZAR
View
B+
Retailer 11
-
$1,557 USD
A$2,396 AUD
View
Retailer 12
-
$1,855 USD
View
Price last confirmed 14 days ago
B
Retailer 13
-
$1,859 USD
£1,464 GBP
View
B
Retailer 14
-
$2,024 USD
SGD 2,735 SGD
View
B
Retailer 15
-
$2,079 USD
View
B
Retailer 16
-
$2,200 USD
View
B
Retailer 17
-
$2,667 USD
£2,100 GBP
View
Most Expensive
B
Brilliant Earth
19077250A · Oct 31
$2,750 USD
View
17 more retailers have this diamond
Prices start from $577 USDSave up to $2,173 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
1.31ct Cushion
$577 USD