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Radiant|Lab Grown|IGI

1.66ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG825660150

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

Certificate IGI LG825660150

Diamond specifications and retailer prices

From $679 SGD
$531 USD
As of October 30, 2026
Save $3,195 SGD (82%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $4,871 SGD at Rare Carat · As of October 18, 2026
View at Rare Carat

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 E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825660150 or 825660150. Listed at 22 retailers as of October 30, 2026, with a 471% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.5°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825660150
Dimensions7.97 × 5.88 × 4.05 mm
L/W Ratio1.36
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
7.97 mm5.88 mm1.66 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825660150
Side View
Table 65.0%Crown 46.5°Girdle: MediumPavilion 36.4°Culet: NoneDepth 68.9%

Caratlytics Score

How it works →
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: Oct 30
Current: $4,871 SGD|Low: $679 SGD|High: $4,928 SGD|Avg: $2,077 SGD|-1.2%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 10
Retailer 11
Retailer 12
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Retailer 21
Retailer 22
November 2, 2026
Retailer 3$679 SGD
Retailer 11$759 SGD
Retailer 22$759 SGD
Retailer 5$841 SGD
Retailer 7$841 SGD
Retailer 19$1,016 SGD
Retailer 10$1,129 SGD
Retailer 16$1,278 SGD
Retailer 4$1,303 SGD
Retailer 2$1,305 SGD
Retailer 18$1,446 SGD
Retailer 9$1,639 SGD
Retailer 21$1,883 SGD
Retailer 8$2,213 SGD
Retailer 12$2,455 SGD
Retailer 14$2,655 SGD
Retailer 15$2,734 SGD
Retailer 20$2,936 SGD
Retailer 13$3,512 SGD
Retailer 6$3,677 SGD
Retailer 17$3,874 SGD
Rare Carat$4,871 SGD

33 data points across 22 retailers

22 retailers$679 SGD to $3,874 SGD

A
Cheapest Retailer
-
$679 SGD
$531 USD
A
Retailer 2
-
$759 SGD
$594 USD
View
Final sale: no returns
A
Retailer 3
-
$759 SGD
$594 USD
View
Retailer 4
-
$841 SGD
$658 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
$841 SGD
$658 USD
View
A
Retailer 6
-
$1,016 SGD
$795 USD
View
A
Retailer 7
-
$1,129 SGD
$883 USD
View
A
Retailer 8
-
$1,278 SGD
€952 EUR
View
A
Retailer 9
-
$1,303 SGD
$1,019 USD
View
A
Retailer 10
-
$1,305 SGD
£804 GBP
View
A
Retailer 11
-
$1,446 SGD
ZAR 18,272 ZAR
View
B+
Retailer 12
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$1,639 SGD
$1,282 USD
View
B+
Retailer 13
-
$1,883 SGD
$1,473 USD
View
B+
Retailer 14
-
$2,213 SGD
$1,731 USD
View
B+
Retailer 15
-
$2,455 SGD
£1,512 GBP
View
B+
Retailer 16
-
$2,655 SGD
View
B+
Retailer 17
-
$2,734 SGD
$2,138 USD
View
B+
Retailer 18
-
$2,936 SGD
$2,297 USD
View
B
Retailer 19
-
$3,512 SGD
£2,163 GBP
View
B
Retailer 20
-
$3,677 SGD
$2,876 USD
View
B
Retailer 21
-
$3,874 SGD
$3,030 USD
View
Most Expensive
Rare Carat
PE-239738 · Oct 18
$4,871 SGD
$3,810 USD
View
Price last confirmed 14 days ago
21 more retailers have this diamond
Prices start from $679 SGDSave up to $3,195 SGD

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
$679 SGD