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Radiant|Lab Grown|IGI

1.64ct D FL Radiant Lab Grown Diamond

VG • D/FL

Diamond specifications and retailer prices

From $678 CAD
$485 USD
As of November 2, 2026
Save $4,194 CAD (86%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $4,871 CAD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.64ct lab-grown radiant diamond

This 1.64ct 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 very-good cut grade and certified by IGI. Listed at 5 retailers as of October 31, 2026, with prices from $678 to $4,871, a $4,194 spread on the same certified stone. Blue Nile lists it at $4,871. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.64
Carat
D
Color
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions8.21 × 5.86 × 3.98 mm
L/W Ratio1.40
Top View
8.21 mm5.86 mm1.64 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 66.0%CrownGirdle: MediumPavilionCulet: NoneDepth 67.9%

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: Nov 2
Current: $4,871 CAD|Low: $678 CAD|High: $6,288 CAD|Avg: $2,792 CAD|+4.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 27, 2026
Retailer 2$678 CAD
Retailer 5$759 CAD
Retailer 3$1,181 CAD
Retailer 4$2,440 CAD
Blue Nile$4,871 CAD
Retailer 6$6,288 CAD

9 data points across 6 retailers

5 retailers$678 CAD to $4,871 CAD

A
Cheapest Retailer
-
$678 CAD
$485 USD
A
Retailer 2
-
$759 CAD
$543 USD
View
A
Retailer 3
-
$1,181 CAD
$845 USD
View
B
Retailer 4
-
$2,440 CAD
$1,746 USD
View
Most Expensive
B
Blue Nile
30353645 · Oct 31
$4,871 CAD
$3,486 USD
View
4 more retailers have this diamond
Prices start from $678 CADSave up to $4,194 CAD

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
1.64ct Radiant
$678 CAD