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Cushion|Lab Grown|IGI

1.86ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840633271

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

Certificate IGI LG840633271

Diamond specifications and retailer prices

From $743 USD
As of October 30, 2026
Save $3,427 USD (82%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $4,170 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.86ct lab-grown cushion diamond

This 1.86ct 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 LG840633271 or 840633271. Listed at 19 retailers as of October 30, 2026, with prices from $743 to $4,170, a $3,427 spread on the same certified stone. Brilliant Earth lists it at $4,170. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.86
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840633271
Dimensions7.16 × 6.99 × 4.77 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
7.16 mm6.99 mm1.86 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840633271
Side View
Table 56.0%Crown 35°Girdle: STK-THKPavilion 38.8°Culet: NoneDepth 68.2%

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: $4,170 USD|Low: $548 USD|High: $5,960 USD|Avg: $2,176 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
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Retailer 17
Retailer 18
Retailer 19
October 30, 2026
Retailer 4$743 USD
Retailer 11$746 USD
Retailer 12$802 USD
Retailer 16$875 USD
Retailer 7$979 USD
Retailer 17$1,159 USD
Retailer 13$1,184 USD
Retailer 15$1,300 USD
Retailer 14$1,303 USD
Retailer 19$1,576 USD
Retailer 6$2,195 USD
Retailer 3$2,445 USD
Retailer 2$2,582 USD
Retailer 8$2,687 USD
Retailer 18$3,288 USD
Retailer 10$3,575 USD
Retailer 9$3,610 USD
Retailer 5$3,787 USD
Brilliant Earth$4,170 USD

23 data points across 19 retailers

19 retailers$743 USD to $4,170 USD

A
Cheapest Retailer
-
$743 USD
Final sale: no returns
Retailer 2
-
$746 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
$802 USD
£632 GBP
View
A
Retailer 4
-
$875 USD
View
A
Retailer 5
-
$979 USD
View
A
Retailer 6
-
$1,159 USD
View
A
Retailer 7
-
$1,184 USD
£932 GBP
View
A
Retailer 8
-
$1,300 USD
ZAR 20,998 ZAR
View
A
Retailer 9
-
$1,303 USD
€1,241 EUR
View
A
Retailer 10
-
$1,576 USD
View
B+
Retailer 11
-
$2,195 USD
£1,728 GBP
View
B+
Retailer 12
-
$2,445 USD
View
B+
Retailer 13
-
$2,582 USD
View
B+
Retailer 14
-
$2,687 USD
SGD 3,631 SGD
View
B+
Retailer 15
-
$3,288 USD
£2,589 GBP
View
B
Retailer 16
-
$3,575 USD
View
Retailer 17
-
$3,610 USD
View
Price last confirmed 9 days ago
B
Retailer 18
-
$3,787 USD
View
Most Expensive
B
Brilliant Earth
21729253A · Oct 30
$4,170 USD
View
18 more retailers have this diamond
Prices start from $743 USDSave up to $3,427 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
1.86ct Cushion
$743 USD