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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 $536 SGD
$419 USD
As of October 30, 2026
Save $4,629 SGD (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,165 SGD 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 $536 to $5,165, a $4,629 spread on the same certified stone. Brilliant Earth lists it at $5,165. 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
Colour
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: Oct 30
Current: $5,165 SGD|Low: $536 SGD|High: $6,187 SGD|Avg: $1,729 SGD|-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 15$536 SGD
Retailer 5$609 SGD
Retailer 7$609 SGD
Retailer 10$786 SGD
Retailer 14$795 SGD
Retailer 8$1,044 SGD
Retailer 4$1,046 SGD
Retailer 9$1,071 SGD
Retailer 11$1,395 SGD
Retailer 12$1,571 SGD
Retailer 2$1,905 SGD
Retailer 3$1,955 SGD
Retailer 16$2,235 SGD
Retailer 13$2,237 SGD
Retailer 6$2,380 SGD
Brilliant Earth$5,165 SGD

36 data points across 16 retailers

20 retailers$536 SGD to $5,165 SGD

A
Cheapest Retailer
-
$536 SGD
$419 USD
Final sale: no returns
Retailer 2
-
$542 SGD
$424 USD
View
Price last confirmed 29 days ago
A
Retailer 3
-
$609 SGD
$476 USD
View
A
Retailer 4
-
$609 SGD
$476 USD
View
Retailer 5
-
$699 SGD
$547 USD
View
Price last confirmed 28 days ago
Retailer 6
-
$785 SGD
HK$4,800 HKD
View
Price last confirmed 57 days ago
A
Retailer 7
-
$786 SGD
$615 USD
View
A
Retailer 8
-
$795 SGD
$622 USD
View
A
Retailer 9
-
$1,046 SGD
ZAR 13,213 ZAR
View
A
Retailer 10
-
$1,071 SGD
£660 GBP
View
A
Retailer 11
-
$1,395 SGD
$1,091 USD
View
B+
Retailer 12
-
$1,571 SGD
$1,229 USD
View
Retailer 13
-
$1,736 SGD
$1,358 USD
View
Price last confirmed 25 days ago
B+
Retailer 14
-
$1,905 SGD
$1,490 USD
View
B+
Retailer 15
-
$1,955 SGD
$1,529 USD
View
B+
Retailer 16
-
$2,235 SGD
$1,748 USD
View
B+
Retailer 17
-
$2,237 SGD
$1,750 USD
View
Retailer 18
-
$2,250 SGD
$1,760 USD
View
Price last confirmed 23 days ago
B+
Retailer 19
-
$2,380 SGD
£1,466 GBP
View
Most Expensive
B
Brilliant Earth
21127849A · Oct 30
$5,165 SGD
$4,040 USD
View
19 more retailers have this diamond
Prices start from $536 SGDSave up to $4,629 SGD

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
$536 SGD