Cushion|Lab Grown|IGI

1.09ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG816624103

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG816624103

Diamond specifications and retailer prices

From $393 USD
As of October 30, 2026
Save $1,727 USD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,120 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.09ct lab-grown cushion diamond

This 1.09ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816624103 or 816624103. Listed at 13 retailers as of October 30, 2026, with prices from $393 to $2,120, a $1,727 spread on the same certified stone. Brilliant Earth lists it at $2,120. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816624103
Dimensions6.25 × 6.10 × 3.89 mm
L/W Ratio1.02
Girdle conditionFaceted
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
6.25 mm6.10 mm1.09 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816624103
Side View
Table 61.0%Crown 35.2°Girdle: THN-STKPavilion 39.8°Culet: NoneDepth 63.8%

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: $2,120 USD|Low: $289 USD|High: $2,920 USD|Avg: $1,133 USD|-27.4%
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
October 30, 2026
Retailer 11$393 USD
Retailer 4$450 USD
Retailer 10$679 USD
Retailer 9$680 USD
Retailer 13$702 USD
Retailer 6$709 USD
Retailer 7$751 USD
Retailer 2$786 USD
Retailer 3$1,446 USD
Retailer 5$1,450 USD
Retailer 8$1,680 USD
Retailer 12$1,709 USD
Brilliant Earth$2,120 USD

35 data points across 13 retailers

13 retailers$393 USD to $2,120 USD

A
Cheapest Retailer
-
$393 USD
Final sale: no returns
A
Retailer 2
-
$450 USD
View
A
Retailer 3
-
$679 USD
View
A
Retailer 4
-
$680 USD
View
A
Retailer 5
-
$702 USD
View
A
Retailer 6
-
$709 USD
€675 EUR
View
A
Retailer 7
-
$751 USD
ZAR 12,131 ZAR
View
A
Retailer 8
-
$786 USD
£619 GBP
View
B+
Retailer 9
-
$1,446 USD
View
Retailer 10
-
$1,450 USD
View
Price last confirmed 12 days ago
B
Retailer 11
-
$1,680 USD
View
B+
Retailer 12
-
$1,709 USD
£1,346 GBP
View
Most Expensive
B
Brilliant Earth
21018849A · Oct 30
$2,120 USD
View
12 more retailers have this diamond
Prices start from $393 USDSave up to $1,727 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
1.09ct Cushion
$393 USD