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Radiant|Lab Grown|IGI

1.65ct D IF Radiant Lab Grown Diamond

D/IF

Diamond specifications and retailer prices

From £358 GBP
As of October 30, 2026
Save £1,675 GBP (82%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,034 GBP at Helzberg Diamonds · As of October 31, 2026
View at Helzberg Diamonds

About this 1.65ct lab-grown radiant diamond

This 1.65ct 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) and certified by IGI. Listed at 2 retailers as of October 30, 2026, with prices from £358 to £2,034, a £1,675 spread on the same certified stone. Helzberg Diamonds lists it at £2,034. 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

1.65
Carat
D
Colour
IF
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions8.18 × 5.91 × 4.03 mm
L/W Ratio1.38
Top View
8.18 mm5.91 mm1.65 ctD / IF
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 65.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 68.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £2,034 GBP|Low: £191 GBP|High: £2,034 GBP|Avg: £609 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8£191 GBP
Retailer 4£270 GBP
Retailer 5£313 GBP
Retailer 7£331 GBP
Retailer 6£334 GBP
Retailer 2£358 GBP
Retailer 3£1,076 GBP
Helzberg Diamonds£2,034 GBP

36 data points across 8 retailers

2 retailers£358 GBP to £2,034 GBP

A
Cheapest Retailer
-
£358 GBP
Most Expensive
C
Helzberg Diamonds
ZXZNGNLLGJJO · Oct 31
£2,034 GBP
$2,725 USD
View
1 more retailer has this diamond
Prices start from £358 GBPSave up to £1,675 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
1.65ct Radiant
£358 GBP