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Radiant|Lab Grown|IGI

1.66ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG844602074

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG844602074

Diamond specifications and retailer prices

From $390 CAD
$279 USD
As of November 2, 2026
Save $4,347 CAD (92%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,737 CAD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.66ct lab-grown radiant diamond

This 1.66ct lab-grown radiant 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 LG844602074 or 844602074. Listed at 18 retailers as of November 2, 2026, with prices from $390 to $4,737, a $4,347 spread on the same certified stone. Brilliant Earth lists it at $4,737. 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 angle46°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844602074
Dimensions8.51 × 5.78 × 3.86 mm
L/W Ratio1.47
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
8.51 mm5.78 mm1.66 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844602074
Side View
Table 66.0%Crown 46°Girdle: Slightly ThickPavilion 33.5°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
A+
Exceptional
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 2
Current: $4,737 CAD|Low: $390 CAD|High: $5,338 CAD|Avg: $1,853 CAD|-11.3%
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
Retailer 17
Retailer 18
November 2, 2026
Retailer 15$390 CAD
Retailer 6$451 CAD
Retailer 2$564 CAD
Retailer 12$706 CAD
Retailer 16$731 CAD
Retailer 3$798 CAD
Retailer 11$885 CAD
Retailer 14$1,243 CAD
Retailer 8$1,322 CAD
Retailer 18$1,484 CAD
Retailer 5$1,527 CAD
Retailer 4$1,713 CAD
Retailer 10$1,998 CAD
Retailer 13$2,147 CAD
Retailer 17$3,466 CAD
Retailer 9$4,018 CAD
Retailer 7$4,368 CAD
Brilliant Earth$4,737 CAD

18 data points across 18 retailers

18 retailers$390 CAD to $4,737 CAD

A+
Cheapest Retailer
-
$390 CAD
$279 USD
A
Retailer 2
-
$451 CAD
$323 USD
View
A
Retailer 3
-
$564 CAD
£318 GBP
View
A
Retailer 4
-
$706 CAD
$505 USD
View
A
Retailer 5
-
$731 CAD
$523 USD
View
A
Retailer 6
-
$798 CAD
$571 USD
View
A
Retailer 7
-
$885 CAD
€603 EUR
View
A
Retailer 8
-
$1,243 CAD
A$1,368 AUD
View
A
Retailer 9
-
$1,322 CAD
$946 USD
View
A
Retailer 10
-
$1,484 CAD
$1,062 USD
View
A
Retailer 11
-
$1,527 CAD
$1,093 USD
View
B+
Retailer 12
-
$1,713 CAD
$1,226 USD
View
Retailer 13
-
$1,998 CAD
$1,430 USD
View
Price last confirmed 17 days ago
B+
Retailer 14
-
$2,147 CAD
£1,210 GBP
View
B
Retailer 15
-
$3,466 CAD
$2,480 USD
View
B
Retailer 16
-
$4,018 CAD
$2,875 USD
View
B
Retailer 17
-
$4,368 CAD
$3,126 USD
View
Most Expensive
B
Brilliant Earth
22166202Y · Nov 2
$4,737 CAD
$3,390 USD
View
17 more retailers have this diamond
Prices start from $390 CADSave up to $4,347 CAD

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 Radiant
$390 CAD