Radiant|Lab Grown|IGI

1.68ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG744514676

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

Certificate IGI LG744514676

Diamond specifications and retailer prices

From $282 USD
As of October 30, 2026
Save $3,108 USD (92%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,390 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.68ct lab-grown radiant diamond

This 1.68ct 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 LG744514676 or 744514676. Listed at 17 retailers as of October 30, 2026, with prices from $282 to $3,390, a $3,108 spread on the same certified stone. Brilliant Earth lists it at $3,390. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.68
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG744514676
Dimensions8.23 × 5.73 × 4.13 mm
L/W Ratio1.44
Culet sizePointed
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
8.23 mm5.73 mm1.68 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG744514676
Side View
Table 66.0%Crown 45.7°Girdle: ThickPavilion 37.3°Culet: NoneDepth 72.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $3,390 USD|Low: $251 USD|High: $4,990 USD|Avg: $1,350 USD|-32.1%
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
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Retailer 17
October 31, 2026
Retailer 13$282 USD
Retailer 5$327 USD
Retailer 9$352 USD
Retailer 14$527 USD
Retailer 2$575 USD
Retailer 17$575 USD
Retailer 7$638 USD
Retailer 12$899 USD
Retailer 8$968 USD
Retailer 16$1,073 USD
Retailer 4$1,102 USD
Retailer 3$1,240 USD
Retailer 11$1,554 USD
Retailer 10$1,795 USD
Retailer 15$2,500 USD
Retailer 6$2,905 USD
Brilliant Earth$3,390 USD

38 data points across 17 retailers

17 retailers$282 USD to $3,390 USD

A
Cheapest Retailer
-
$282 USD
A
Retailer 2
-
$327 USD
View
A
Retailer 3
-
$352 USD
View
Final sale: no returns
A
Retailer 4
-
$527 USD
View
A
Retailer 5
-
$575 USD
View
A
Retailer 6
-
$575 USD
View
Retailer 7
-
$638 USD
€608 EUR
View
Price last confirmed 7 days ago
A
Retailer 8
-
$899 USD
A$1,383 AUD
View
A
Retailer 9
-
$968 USD
View
B+
Retailer 10
-
$1,073 USD
View
A
Retailer 11
-
$1,102 USD
View
B+
Retailer 12
-
$1,240 USD
View
B+
Retailer 13
-
$1,554 USD
£1,224 GBP
View
B+
Retailer 14
-
$1,795 USD
A$2,761 AUD
View
B
Retailer 15
-
$2,500 USD
View
B
Retailer 16
-
$2,905 USD
View
Most Expensive
B
Brilliant Earth
17496203Y · Oct 30
$3,390 USD
View
16 more retailers have this diamond
Prices start from $282 USDSave up to $3,108 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
1.68ct Radiant
$282 USD