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Cushion|Lab Grown|IGI

1.65ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG836620508

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG836620508

Diamond specifications and retailer prices

From $640 USD
As of October 30, 2026
Save $3,540 USD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,180 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.65ct lab-grown cushion diamond

This 1.65ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG836620508 or 836620508. Listed at 15 retailers as of October 29, 2026, with prices from $640 to $4,180, a $3,540 spread on the same certified stone. Brilliant Earth lists it at $4,180. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.65
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836620508
Dimensions8.80 × 5.94 × 4.01 mm
L/W Ratio1.48
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
8.80 mm5.94 mm1.65 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836620508
Side View
Table 63.0%Crown 32.6°Girdle: MED-THKPavilion 34.7°Culet: NoneDepth 67.5%

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 30
Current: $4,180 USD|Low: $640 USD|High: $4,320 USD|Avg: $1,910 USD|-3.2%
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
October 30, 2026
Retailer 14$640 USD
Retailer 7$756 USD
Retailer 11$805 USD
Retailer 3$1,077 USD
Retailer 2$1,091 USD
Retailer 8$1,131 USD
Retailer 10$1,202 USD
Retailer 12$1,281 USD
Retailer 5$1,574 USD
Retailer 15$2,042 USD
Retailer 4$2,241 USD
Retailer 13$2,266 USD
Retailer 6$3,050 USD
Retailer 9$3,052 USD
Brilliant Earth$4,180 USD

31 data points across 15 retailers

15 retailers$640 USD to $4,180 USD

A
Cheapest Retailer
-
$640 USD
Final sale: no returns
Retailer 2
-
$756 USD
View
Price last confirmed 13 days ago
A
Retailer 3
-
$805 USD
View
A
Retailer 4
-
$1,077 USD
View
A
Retailer 5
-
$1,091 USD
£859 GBP
View
A
Retailer 6
-
$1,131 USD
€1,077 EUR
View
A
Retailer 7
-
$1,202 USD
ZAR 19,413 ZAR
View
A
Retailer 8
-
$1,281 USD
View
A
Retailer 9
-
$1,574 USD
View
B+
Retailer 10
-
$2,042 USD
£1,608 GBP
View
B+
Retailer 11
-
$2,241 USD
View
B+
Retailer 12
-
$2,266 USD
View
Retailer 13
-
$3,050 USD
View
Price last confirmed 8 days ago
B+
Retailer 14
-
$3,052 USD
£2,403 GBP
View
Most Expensive
B
Brilliant Earth
21589063A · Oct 29
$4,180 USD
View
14 more retailers have this diamond
Prices start from $640 USDSave up to $3,540 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
1.65ct Cushion
$640 USD