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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 £361 GBP
$485 USD
As of November 2, 2026
Save £2,236 GBP (86%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,598 GBP at Blue Nile · As of November 3, 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 November 2, 2026, with prices from £361 to £2,598, a £2,236 spread on the same certified stone. Blue Nile lists it at £2,598. 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
Colour
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: £2,598 GBP|Low: £361 GBP|High: £3,353 GBP|Avg: £1,489 GBP|+4.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 27, 2026
Retailer 2£361 GBP
Retailer 5£405 GBP
Retailer 3£630 GBP
Retailer 4£1,301 GBP
Blue Nile£2,598 GBP
Retailer 6£3,353 GBP

9 data points across 6 retailers

5 retailers£361 GBP to £2,598 GBP

A
Cheapest Retailer
-
£361 GBP
$485 USD
A
Retailer 2
-
£405 GBP
$543 USD
View
A
Retailer 3
-
£630 GBP
$845 USD
View
B
Retailer 4
-
£1,301 GBP
$1,746 USD
View
Most Expensive
B
Blue Nile
30353645 · Nov 3
£2,598 GBP
$3,486 USD
View
4 more retailers have this diamond
Prices start from £361 GBPSave up to £2,236 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
1.64ct Radiant
£361 GBP