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Cushion|Lab Grown|IGI

1.80ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG799646975

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

Certificate IGI LG799646975

Diamond specifications and retailer prices

From $627 USD
As of October 31, 2026
Save $3,403 USD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $4,030 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.8ct lab-grown cushion diamond

This 1.8ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799646975 or 799646975. Listed at 19 retailers as of October 31, 2026, with prices from $627 to $4,030, a $3,403 spread on the same certified stone. Brilliant Earth lists it at $4,030. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.80
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799646975
Dimensions6.91 × 6.91 × 4.46 mm
L/W Ratio1.00
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
6.91 mm6.91 mm1.80 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799646975
Side View
Table 61.0%Crown 32.6°Girdle: MED-THKPavilion 35.7°Culet: NoneDepth 64.5%

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 31
Current: $4,030 USD|Low: $627 USD|High: $5,760 USD|Avg: $1,858 USD|-30.0%
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
October 31, 2026
Retailer 11$627 USD
Retailer 10$733 USD
Retailer 14$737 USD
Retailer 16$805 USD
Retailer 6$922 USD
Retailer 7$1,071 USD
Retailer 12$1,084 USD
Retailer 2$1,127 USD
Retailer 15$1,195 USD
Retailer 18$1,474 USD
Retailer 8$1,568 USD
Retailer 5$2,027 USD
Retailer 13$2,252 USD
Retailer 3$2,254 USD
Retailer 9$2,344 USD
Retailer 17$3,021 USD
Retailer 4$3,275 USD
Brilliant Earth$4,030 USD

25 data points across 18 retailers

19 retailers$627 USD to $4,030 USD

A
Cheapest Retailer
-
$627 USD
Final sale: no returns
Retailer 2
-
$733 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
$737 USD
£580 GBP
View
A
Retailer 4
-
$805 USD
View
A
Retailer 5
-
$922 USD
View
A
Retailer 6
-
$1,071 USD
View
A
Retailer 7
-
$1,084 USD
£854 GBP
View
A
Retailer 8
-
$1,127 USD
€1,073 EUR
View
A
Retailer 9
-
$1,195 USD
ZAR 19,298 ZAR
View
A
Retailer 10
-
$1,474 USD
View
A
Retailer 11
-
$1,568 USD
View
B+
Retailer 12
-
$2,027 USD
£1,596 GBP
View
B+
Retailer 13
-
$2,252 USD
View
B+
Retailer 14
-
$2,254 USD
View
B+
Retailer 15
-
$2,344 USD
SGD 3,167 SGD
View
B+
Retailer 16
-
$2,432 USD
View
B+
Retailer 17
-
$3,021 USD
£2,379 GBP
View
B+
Retailer 18
-
$3,275 USD
View
Most Expensive
B
Brilliant Earth
21420167A · Oct 31
$4,030 USD
View
18 more retailers have this diamond
Prices start from $627 USDSave up to $3,403 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
1.80ct Cushion
$627 USD