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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 €375 EUR
$419 USD
As of October 30, 2026
Save €3,241 EUR (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €3,616 EUR 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 €375 to €3,616, a €3,241 spread on the same certified stone. Brilliant Earth lists it at €3,616. 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

How it works →
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: €3,616 EUR|Low: €375 EUR|High: €4,332 EUR|Avg: €1,210 EUR|-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
October 31, 2026
Retailer 16€375 EUR
Retailer 2€415 EUR
Retailer 6€426 EUR
Retailer 11€550 EUR
Retailer 15€557 EUR
Retailer 8€731 EUR
Retailer 5€732 EUR
Retailer 10€750 EUR
Retailer 12€977 EUR
Retailer 13€1,100 EUR
Retailer 9€1,334 EUR
Retailer 4€1,369 EUR
Retailer 3€1,565 EUR
Retailer 14€1,566 EUR
Retailer 7€1,666 EUR
Brilliant Earth€3,616 EUR

36 data points across 16 retailers

20 retailers€375 EUR to €3,616 EUR

A
Cheapest Retailer
-
€375 EUR
$419 USD
Final sale: no returns
Retailer 2
-
€380 EUR
$424 USD
View
Price last confirmed 30 days ago
A
Retailer 3
-
€415 EUR
$464 USD
View
A
Retailer 4
-
€426 EUR
$476 USD
View
Retailer 5
-
€490 EUR
$547 USD
View
Price last confirmed 29 days ago
Retailer 6
-
€550 EUR
HK$4,800 HKD
View
Price last confirmed 58 days ago
A
Retailer 7
-
€550 EUR
$615 USD
View
A
Retailer 8
-
€557 EUR
$622 USD
View
A
Retailer 9
-
€732 EUR
ZAR 13,213 ZAR
View
A
Retailer 10
-
€750 EUR
£660 GBP
View
A
Retailer 11
-
€977 EUR
$1,091 USD
View
B+
Retailer 12
-
€1,100 EUR
$1,229 USD
View
Retailer 13
-
€1,216 EUR
$1,358 USD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
€1,334 EUR
$1,490 USD
View
B+
Retailer 15
-
€1,369 EUR
$1,529 USD
View
B+
Retailer 16
-
€1,565 EUR
$1,748 USD
View
B+
Retailer 17
-
€1,566 EUR
$1,750 USD
View
Retailer 18
-
€1,575 EUR
$1,760 USD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
€1,666 EUR
£1,466 GBP
View
Most Expensive
B
Brilliant Earth
21127849A · Oct 30
€3,616 EUR
$4,040 USD
View
19 more retailers have this diamond
Prices start from €375 EURSave up to €3,241 EUR

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
€375 EUR