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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 $398 AUD
$279 USD
As of November 2, 2026
Save $4,439 AUD (92%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,837 AUD 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 $398 to $4,837, a $4,439 spread on the same certified stone. Brilliant Earth lists it at $4,837. 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
Colour
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

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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 2
Current: $4,837 AUD|Low: $398 AUD|High: $5,451 AUD|Avg: $1,893 AUD|-11.3%
Brilliant Earth
Retailer 2
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Retailer 4
Retailer 5
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Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 18
November 2, 2026
Retailer 15$398 AUD
Retailer 6$461 AUD
Retailer 2$576 AUD
Retailer 12$721 AUD
Retailer 16$746 AUD
Retailer 3$815 AUD
Retailer 11$903 AUD
Retailer 14$1,269 AUD
Retailer 8$1,350 AUD
Retailer 18$1,515 AUD
Retailer 5$1,560 AUD
Retailer 4$1,749 AUD
Retailer 10$2,040 AUD
Retailer 13$2,193 AUD
Retailer 17$3,539 AUD
Retailer 9$4,102 AUD
Retailer 7$4,460 AUD
Brilliant Earth$4,837 AUD

18 data points across 18 retailers

18 retailers$398 AUD to $4,837 AUD

A+
Cheapest Retailer
-
$398 AUD
$279 USD
A
Retailer 2
-
$461 AUD
$323 USD
View
A
Retailer 3
-
$576 AUD
£318 GBP
View
A
Retailer 4
-
$721 AUD
$505 USD
View
A
Retailer 5
-
$746 AUD
$523 USD
View
A
Retailer 6
-
$815 AUD
$571 USD
View
A
Retailer 7
-
$903 AUD
€603 EUR
View
A
Retailer 8
-
$1,269 AUD
View
A
Retailer 9
-
$1,350 AUD
$946 USD
View
A
Retailer 10
-
$1,515 AUD
$1,062 USD
View
A
Retailer 11
-
$1,560 AUD
$1,093 USD
View
B+
Retailer 12
-
$1,749 AUD
$1,226 USD
View
Retailer 13
-
$2,040 AUD
$1,430 USD
View
Price last confirmed 17 days ago
B+
Retailer 14
-
$2,193 AUD
£1,210 GBP
View
B
Retailer 15
-
$3,539 AUD
$2,480 USD
View
B
Retailer 16
-
$4,102 AUD
$2,875 USD
View
B
Retailer 17
-
$4,460 AUD
$3,126 USD
View
Most Expensive
B
Brilliant Earth
22166202Y · Nov 2
$4,837 AUD
$3,390 USD
View
17 more retailers have this diamond
Prices start from $398 AUDSave up to $4,439 AUD

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
$398 AUD