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Oval|Lab Grown|IGI

1.66ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG627421853

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG627421853

Diamond specifications and retailer prices

From $304 USD
As of November 1, 2026
Save $1,220 USD (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,524 USD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG627421853 or 627421853. Listed at 20 retailers as of November 1, 2026, with prices from $304 to $1,524, a $1,220 spread on the same certified stone. Reve Diamonds lists it at $1,524. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.66
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG627421853
Dimensions9.36 × 6.73 × 4.18 mm
L/W Ratio1.39
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.36 mm6.73 mm1.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG627421853
Side View
Table 61.0%Crown 35°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.1%

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: Nov 1
Current: $1,509 USD|Low: $292 USD|High: $1,850 USD|Avg: $808 USD|-1.1%
Retailer 1
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
Reve Diamonds
November 1, 2026
Retailer 14$304 USD
Retailer 8$339 USD
Retailer 4$352 USD
Retailer 15$377 USD
Retailer 9$482 USD
Retailer 3$530 USD
Retailer 16$569 USD
Retailer 11$613 USD
Retailer 7$615 USD
Retailer 10$663 USD
Retailer 12$681 USD
Retailer 6$971 USD
Retailer 5$980 USD
Retailer 2$1,210 USD
Retailer 13$1,260 USD
Retailer 1$1,509 USD
Reve Diamonds$1,524 USD

36 data points across 17 retailers

20 retailers$304 USD to $1,524 USD

A
Cheapest Retailer
-
$304 USD
A
Retailer 2
-
$339 USD
View
Final sale: no returns
A
Retailer 3
-
$352 USD
View
A
Retailer 4
-
$377 USD
View
Retailer 5
-
$377 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$482 USD
£380 GBP
View
A
Retailer 7
-
$530 USD
View
A
Retailer 8
-
$569 USD
View
B+
Retailer 9
-
$613 USD
€584 EUR
View
B+
Retailer 10
-
$615 USD
View
B+
Retailer 11
-
$663 USD
£522 GBP
View
B+
Retailer 12
-
$681 USD
A$1,048 AUD
View
B+
Retailer 13
-
$716 USD
View
B+
Retailer 14
-
$971 USD
View
Retailer 15
-
$980 USD
View
Price last confirmed 11 days ago
B
Retailer 16
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$1,210 USD
View
B
Retailer 17
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$1,258 USD
View
B
Retailer 18
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$1,260 USD
View
B
Retailer 19
-
$1,509 USD
£1,188 GBP
View
Most Expensive
B
Reve Diamonds
D564D4A9A · Nov 1
$1,524 USD
View
19 more retailers have this diamond
Prices start from $304 USDSave up to $1,220 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
$304 USD