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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 $567 USD
As of November 2, 2026
Save $4,463 USD (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,030 USD 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 $567 to $5,030, a $4,463 spread on the same certified stone. Do Amore Diamonds lists it at $5,030. 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
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: $5,030 USD|Low: $567 USD|High: $5,880 USD|Avg: $2,160 USD|-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$567 USD
Retailer 14$635 USD
Retailer 6$754 USD
Retailer 10$833 USD
Retailer 4$845 USD
Retailer 5$1,023 USD
Retailer 9$1,082 USD
Retailer 2$1,244 USD
Retailer 11$1,744 USD
Retailer 12$2,040 USD
Retailer 13$3,061 USD
Retailer 7$3,680 USD
Retailer 3$3,960 USD
Do Amore Diamonds$5,030 USD

31 data points across 14 retailers

14 retailers$567 USD to $5,030 USD

A
Cheapest Retailer
-
$567 USD
A
Retailer 2
-
$635 USD
View
A
Retailer 3
-
$754 USD
View
Final sale: no returns
A
Retailer 4
-
$833 USD
View
A
Retailer 5
-
$845 USD
View
A
Retailer 6
-
$1,023 USD
View
A
Retailer 7
-
$1,082 USD
View
B+
Retailer 8
-
$1,244 USD
€1,185 EUR
View
B+
Retailer 9
-
$1,744 USD
View
B+
Retailer 10
-
$2,040 USD
View
B
Retailer 11
-
$3,061 USD
£2,410 GBP
View
B
Retailer 12
-
$3,680 USD
View
B
Retailer 13
-
$3,960 USD
View
Most Expensive
B
Do Amore Diamonds
27-C7490B28A · Nov 1
$5,030 USD
View
13 more retailers have this diamond
Prices start from $567 USDSave up to $4,463 USD

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
$567 USD