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Radiant|Lab Grown|IGI

1.66ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG800676877

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

Certificate IGI LG800676877

Diamond specifications and retailer prices

From £423 GBP
$567 USD
As of November 2, 2026
Save £3,326 GBP (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,748 GBP at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800676877 or 800676877. Listed at 14 retailers as of November 1, 2026, with prices from £423 to £3,748, a £3,326 spread on the same certified stone. Do Amore Diamonds lists it at £3,748. 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.8°
Pavilion angle34.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800676877
Dimensions8.55 × 5.88 × 3.87 mm
L/W Ratio1.45
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
8.55 mm5.88 mm1.66 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800676877
Side View
Table 62.0%Crown 40.8°Girdle: Slightly ThickPavilion 34.1°Culet: NoneDepth 65.8%

Caratlytics Score

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A
Excellent
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: £3,748 GBP|Low: £423 GBP|High: £4,382 GBP|Avg: £1,610 GBP|-14.5%
Do Amore Diamonds
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
October 31, 2026
Retailer 8£423 GBP
Retailer 14£473 GBP
Retailer 6£562 GBP
Retailer 10£621 GBP
Retailer 4£630 GBP
Retailer 5£762 GBP
Retailer 9£806 GBP
Retailer 2£927 GBP
Retailer 11£1,300 GBP
Retailer 12£1,520 GBP
Retailer 13£2,281 GBP
Retailer 7£2,742 GBP
Retailer 3£2,951 GBP
Do Amore Diamonds£3,748 GBP

31 data points across 14 retailers

14 retailers£423 GBP to £3,748 GBP

A
Cheapest Retailer
-
£423 GBP
$567 USD
A
Retailer 2
-
£473 GBP
$635 USD
View
A
Retailer 3
-
£562 GBP
$754 USD
View
Final sale: no returns
A
Retailer 4
-
£621 GBP
$833 USD
View
A
Retailer 5
-
£630 GBP
$845 USD
View
A
Retailer 6
-
£762 GBP
$1,023 USD
View
A
Retailer 7
-
£806 GBP
$1,082 USD
View
B+
Retailer 8
-
£927 GBP
€1,185 EUR
View
B+
Retailer 9
-
£1,300 GBP
$1,744 USD
View
B+
Retailer 10
-
£1,520 GBP
$2,040 USD
View
B
Retailer 11
-
£2,281 GBP
View
B
Retailer 12
-
£2,742 GBP
$3,680 USD
View
B
Retailer 13
-
£2,951 GBP
$3,960 USD
View
Most Expensive
B
Do Amore Diamonds
27-C7490B28A · Nov 1
£3,748 GBP
$5,030 USD
View
13 more retailers have this diamond
Prices start from £423 GBPSave up to £3,326 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
£423 GBP