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Oval|Lab Grown|IGI

1.66ct E FL Oval Lab Grown Diamond

EX • E/FL • IGI LG818651106

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG818651106

Diamond specifications and retailer prices

From $419 USD
As of November 1, 2026
Save $3,621 USD (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,040 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.66ct lab-grown oval diamond

This 1.66ct lab-grown oval 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 LG818651106 or 818651106. Listed at 20 retailers as of October 30, 2026, with prices from $419 to $4,040, a $3,621 spread on the same certified stone. Brilliant Earth lists it at $4,040. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
E
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818651106
Dimensions9.33 × 6.62 × 4.17 mm
L/W Ratio1.41
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
9.33 mm6.62 mm1.66 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818651106
Side View
Table 61.0%Crown 34.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 63.0%

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: Nov 1
Current: $4,040 USD|Low: $419 USD|High: $4,840 USD|Avg: $1,333 USD|-16.5%
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
November 1, 2026
Retailer 3$419 USD
Retailer 10$464 USD
Retailer 7$476 USD
Retailer 12$615 USD
Retailer 16$622 USD
Retailer 8$817 USD
Retailer 6$818 USD
Retailer 9$838 USD
Retailer 13$1,091 USD
Retailer 14$1,229 USD
Retailer 11$1,490 USD
Retailer 5$1,529 USD
Retailer 4$1,748 USD
Retailer 15$1,750 USD
Retailer 2$1,811 USD
Brilliant Earth$4,040 USD

37 data points across 16 retailers

20 retailers$419 USD to $4,040 USD

A
Cheapest Retailer
-
$419 USD
Final sale: no returns
Retailer 2
-
$424 USD
View
Price last confirmed 32 days ago
A
Retailer 3
-
$464 USD
View
Retailer 4
-
$476 USD
View
Price last confirmed 8 days ago
Retailer 5
-
$547 USD
View
Price last confirmed 31 days ago
Retailer 6
-
$614 USD
HK$4,800 HKD
View
Price last confirmed 59 days ago
A
Retailer 7
-
$615 USD
View
A
Retailer 8
-
$622 USD
View
A
Retailer 9
-
$818 USD
ZAR 13,213 ZAR
View
A
Retailer 10
-
$838 USD
£660 GBP
View
A
Retailer 11
-
$1,091 USD
View
B+
Retailer 12
-
$1,229 USD
View
Retailer 13
-
$1,358 USD
View
Price last confirmed 28 days ago
B+
Retailer 14
-
$1,490 USD
View
B+
Retailer 15
-
$1,529 USD
View
B+
Retailer 16
-
$1,748 USD
View
B+
Retailer 17
-
$1,750 USD
View
Retailer 18
-
$1,760 USD
View
Price last confirmed 26 days ago
B+
Retailer 19
-
$1,811 USD
£1,426 GBP
View
Most Expensive
B
Brilliant Earth
21127849A · Oct 30
$4,040 USD
View
19 more retailers have this diamond
Prices start from $419 USDSave up to $3,621 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
1.66ct Oval
$419 USD