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Oval|Lab Grown|IGI

1.66ct D IF Oval Lab Grown Diamond

ID • D/IF • IGI LG756555563

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG756555563

Diamond specifications and retailer prices

From $264 USD
As of November 1, 2026
Save $2,856 USD (92%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,120 USD at Brilliant Earth · As of November 2, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG756555563 or 756555563. Listed at 15 retailers as of November 1, 2026, with prices from $264 to $3,120, a $2,856 spread on the same certified stone. Brilliant Earth lists it at $3,120. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG756555563
Dimensions9.95 × 6.82 × 3.93 mm
L/W Ratio1.46
Girdle conditionFaceted
Culet sizePointed
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
9.95 mm6.82 mm1.66 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG756555563
Side View
Table 60.0%Crown 33.1°Girdle: THN-MEDPavilion 38.9°Culet: NoneDepth 57.6%

Caratlytics Score

How it works →
A+
Exceptional
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: $3,120 USD|Low: $264 USD|High: $3,860 USD|Avg: $1,197 USD|-19.2%
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
November 2, 2026
Retailer 3$264 USD
Retailer 5$306 USD
Retailer 6$314 USD
Retailer 9$515 USD
Retailer 14$544 USD
Retailer 11$595 USD
Retailer 8$839 USD
Retailer 2$938 USD
Retailer 4$1,103 USD
Retailer 10$1,161 USD
Retailer 7$1,447 USD
Retailer 13$2,340 USD
Retailer 12$2,795 USD
Brilliant Earth$3,120 USD

34 data points across 14 retailers

15 retailers$264 USD to $3,120 USD

A+
Cheapest Retailer
-
$264 USD
A
Retailer 2
-
$306 USD
View
A
Retailer 3
-
$314 USD
View
Final sale: no returns
A
Retailer 4
-
$515 USD
View
A
Retailer 5
-
$544 USD
View
A
Retailer 6
-
$595 USD
View
A
Retailer 7
-
$839 USD
A$1,291 AUD
View
A
Retailer 8
-
$938 USD
View
Retailer 9
-
$949 USD
View
Price last confirmed 47 days ago
A
Retailer 10
-
$1,103 USD
View
B+
Retailer 11
-
$1,161 USD
View
B+
Retailer 12
-
$1,447 USD
£1,139 GBP
View
B+
Retailer 13
-
$2,340 USD
View
B
Retailer 14
-
$2,795 USD
View
Most Expensive
B
Brilliant Earth
21411424Y · Nov 2
$3,120 USD
View
14 more retailers have this diamond
Prices start from $264 USDSave up to $2,856 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
$264 USD