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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 $496 NZD
$279 USD
As of November 2, 2026
Save $5,529 NZD (92%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $6,025 NZD 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 $496 to $6,025, a $5,529 spread on the same certified stone. Brilliant Earth lists it at $6,025. 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

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: $6,025 NZD|Low: $496 NZD|High: $6,789 NZD|Avg: $2,357 NZD|-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$496 NZD
Retailer 6$574 NZD
Retailer 2$717 NZD
Retailer 12$898 NZD
Retailer 16$930 NZD
Retailer 3$1,015 NZD
Retailer 11$1,125 NZD
Retailer 14$1,580 NZD
Retailer 8$1,681 NZD
Retailer 18$1,887 NZD
Retailer 5$1,943 NZD
Retailer 4$2,179 NZD
Retailer 10$2,542 NZD
Retailer 13$2,731 NZD
Retailer 17$4,408 NZD
Retailer 9$5,110 NZD
Retailer 7$5,556 NZD
Brilliant Earth$6,025 NZD

18 data points across 18 retailers

18 retailers$496 NZD to $6,025 NZD

A+
Cheapest Retailer
-
$496 NZD
$279 USD
A
Retailer 2
-
$574 NZD
$323 USD
View
A
Retailer 3
-
$717 NZD
£318 GBP
View
A
Retailer 4
-
$898 NZD
$505 USD
View
A
Retailer 5
-
$930 NZD
$523 USD
View
A
Retailer 6
-
$1,015 NZD
$571 USD
View
A
Retailer 7
-
$1,125 NZD
€603 EUR
View
A
Retailer 8
-
$1,580 NZD
A$1,368 AUD
View
A
Retailer 9
-
$1,681 NZD
$946 USD
View
A
Retailer 10
-
$1,887 NZD
$1,062 USD
View
A
Retailer 11
-
$1,943 NZD
$1,093 USD
View
B+
Retailer 12
-
$2,179 NZD
$1,226 USD
View
Retailer 13
-
$2,542 NZD
$1,430 USD
View
Price last confirmed 17 days ago
B+
Retailer 14
-
$2,731 NZD
£1,210 GBP
View
B
Retailer 15
-
$4,408 NZD
$2,480 USD
View
B
Retailer 16
-
$5,110 NZD
$2,875 USD
View
B
Retailer 17
-
$5,556 NZD
$3,126 USD
View
Most Expensive
B
Brilliant Earth
22166202Y · Nov 2
$6,025 NZD
$3,390 USD
View
17 more retailers have this diamond
Prices start from $496 NZDSave up to $5,529 NZD

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
$496 NZD