CaratHunter
Plans
Oval|Lab Grown|IGI

1.66ct D IF Oval Lab Grown Diamond

ID • D/IF • IGI LG836639839

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG836639839

Diamond specifications and retailer prices

From $260 USD
As of November 1, 2026
Save $2,860 USD (92%) vs most expensive(unlock to see where)
16 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 LG836639839 or 836639839. Listed at 16 retailers as of November 1, 2026, with prices from $260 to $3,120, a $2,860 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 angle34.4°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836639839
Dimensions9.51 × 6.77 × 4.13 mm
L/W Ratio1.40
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
9.51 mm6.77 mm1.66 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836639839
Side View
Table 58.0%Crown 34.4°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 61.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,120 USD|Low: $260 USD|High: $3,750 USD|Avg: $1,268 USD|-16.8%
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 2, 2026
Retailer 13$260 USD
Retailer 2$376 USD
Retailer 5$520 USD
Retailer 3$537 USD
Retailer 11$593 USD
Retailer 15$712 USD
Retailer 16$827 USD
Retailer 8$855 USD
Retailer 7$944 USD
Retailer 12$989 USD
Retailer 4$1,143 USD
Retailer 10$1,425 USD
Retailer 6$2,066 USD
Retailer 14$2,310 USD
Retailer 9$2,795 USD
Brilliant Earth$3,120 USD

34 data points across 16 retailers

16 retailers$260 USD to $3,120 USD

A
Cheapest Retailer
-
$260 USD
A
Retailer 2
-
$376 USD
£296 GBP
View
A
Retailer 3
-
$520 USD
View
A
Retailer 4
-
$537 USD
View
A
Retailer 5
-
$593 USD
€565 EUR
View
A
Retailer 6
-
$641 USD
View
A
Retailer 7
-
$827 USD
A$1,272 AUD
View
A
Retailer 8
-
$855 USD
View
A
Retailer 9
-
$944 USD
View
A
Retailer 10
-
$989 USD
View
B+
Retailer 11
-
$1,143 USD
View
B+
Retailer 12
-
$1,425 USD
£1,122 GBP
View
Retailer 13
-
$2,066 USD
A$3,179 AUD
View
Price last confirmed 31 days ago
B
Retailer 14
-
$2,310 USD
View
B
Retailer 15
-
$2,795 USD
View
Most Expensive
B
Brilliant Earth
21581582Y · Nov 2
$3,120 USD
View
15 more retailers have this diamond
Prices start from $260 USDSave up to $2,860 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
$260 USD