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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 £208 GBP
$279 USD
As of November 2, 2026
Save £2,318 GBP (92%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,526 GBP 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 £208 to £2,526, a £2,318 spread on the same certified stone. Brilliant Earth lists it at £2,526. 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: £2,526 GBP|Low: £208 GBP|High: £2,847 GBP|Avg: £987 GBP|-11.3%
Brilliant Earth
Retailer 2
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Retailer 18
November 3, 2026
Retailer 15£208 GBP
Retailer 6£241 GBP
Retailer 11£301 GBP
Retailer 13£376 GBP
Retailer 16£390 GBP
Retailer 3£426 GBP
Retailer 12£472 GBP
Retailer 14£663 GBP
Retailer 8£705 GBP
Retailer 18£791 GBP
Retailer 5£815 GBP
Retailer 4£914 GBP
Retailer 10£1,066 GBP
Retailer 2£1,139 GBP
Retailer 17£1,848 GBP
Retailer 9£2,142 GBP
Retailer 7£2,329 GBP
Brilliant Earth£2,526 GBP

19 data points across 18 retailers

18 retailers£208 GBP to £2,526 GBP

A+
Cheapest Retailer
-
£208 GBP
$279 USD
A
Retailer 2
-
£241 GBP
$323 USD
View
A
Retailer 3
-
£301 GBP
View
A
Retailer 4
-
£376 GBP
$505 USD
View
A
Retailer 5
-
£390 GBP
$523 USD
View
A
Retailer 6
-
£426 GBP
$571 USD
View
A
Retailer 7
-
£472 GBP
€603 EUR
View
A
Retailer 8
-
£663 GBP
A$1,368 AUD
View
A
Retailer 9
-
£705 GBP
$946 USD
View
A
Retailer 10
-
£791 GBP
$1,062 USD
View
A
Retailer 11
-
£815 GBP
$1,093 USD
View
B+
Retailer 12
-
£914 GBP
$1,226 USD
View
Retailer 13
-
£1,066 GBP
$1,430 USD
View
Price last confirmed 18 days ago
B+
Retailer 14
-
£1,139 GBP
View
B
Retailer 15
-
£1,848 GBP
$2,480 USD
View
B
Retailer 16
-
£2,142 GBP
$2,875 USD
View
B
Retailer 17
-
£2,329 GBP
$3,126 USD
View
Most Expensive
B
Brilliant Earth
22166202Y · Nov 2
£2,526 GBP
$3,390 USD
View
17 more retailers have this diamond
Prices start from £208 GBPSave up to £2,318 GBP

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
£208 GBP