Cushion|Lab Grown|IGI

1.00ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG818640099

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818640099

Diamond specifications and retailer prices

From $637 USD
As of October 30, 2026
Save $1,973 USD (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,610 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct 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 LG818640099 or 818640099. Listed at 16 retailers as of October 29, 2026, with prices from $637 to $2,610, a $1,973 spread on the same certified stone. Brilliant Earth lists it at $2,610. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818640099
Dimensions6.98 × 5.35 × 3.55 mm
L/W Ratio1.30
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
6.98 mm5.35 mm1.00 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818640099
Side View
Table 62.0%Crown 33.8°Girdle: THN-STKPavilion 41.4°Culet: NoneDepth 66.4%

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: $2,610 USD|Low: $383 USD|High: $2,690 USD|Avg: $1,275 USD|-3.0%
Brilliant Earth
Retailer 2
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
October 31, 2026
Retailer 16$539 USD
Retailer 15$637 USD
Retailer 14$653 USD
Retailer 13$735 USD
Retailer 7$800 USD
Retailer 5$811 USD
Retailer 2$896 USD
Retailer 10$991 USD
Retailer 12$1,026 USD
Retailer 8$1,296 USD
Retailer 9$1,306 USD
Retailer 6$1,575 USD
Retailer 4$1,947 USD
Retailer 3$2,092 USD
Retailer 11$2,506 USD
Brilliant Earth$2,610 USD

38 data points across 16 retailers

16 retailers$637 USD to $2,610 USD

Retailer 1
-
$539 USD
Price last confirmed 12 days ago
Final sale: no returns
A
Retailer 2
-
$637 USD
View
A
Retailer 3
-
$653 USD
HK$5,100 HKD
View
A
Retailer 4
-
$735 USD
View
A
Retailer 5
-
$800 USD
View
A
Retailer 6
-
$811 USD
View
B+
Retailer 7
-
$896 USD
€853 EUR
View
B+
Retailer 8
-
$991 USD
£781 GBP
View
B+
Retailer 9
-
$1,026 USD
ZAR 16,574 ZAR
View
Retailer 10
-
$1,296 USD
View
Price last confirmed 52 days ago
B+
Retailer 11
-
$1,306 USD
View
B
Retailer 12
-
$1,575 USD
SGD 2,128 SGD
View
B
Retailer 13
-
$1,947 USD
View
B
Retailer 14
-
$2,092 USD
View
B
Retailer 15
-
$2,506 USD
£1,973 GBP
View
Most Expensive
B
Brilliant Earth
21086551A · Oct 29
$2,610 USD
View
15 more retailers have this diamond
Prices start from $637 USDSave up to $1,973 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
1.00ct Cushion
$637 USD