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Radiant|Lab Grown|IGI

1.65ct D IF Radiant Lab Grown Diamond

D/IF

Diamond specifications and retailer prices

From $681 AUD
£377 GBP
As of November 1, 2026
Save $3,198 AUD (82%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $3,879 AUD 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 31, 2026, with prices from $681 to $3,879, a $3,198 spread on the same certified stone. Helzberg Diamonds lists it at $3,879. 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: Nov 1
Current: $3,879 AUD|Low: $365 AUD|High: $3,879 AUD|Avg: $1,163 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 8$365 AUD
Retailer 4$515 AUD
Retailer 5$598 AUD
Retailer 7$631 AUD
Retailer 6$638 AUD
Retailer 2$681 AUD
Retailer 3$2,053 AUD
Helzberg Diamonds$3,879 AUD

37 data points across 8 retailers

2 retailers$681 AUD to $3,879 AUD

A
Cheapest Retailer
-
$681 AUD
£377 GBP
Most Expensive
C
Helzberg Diamonds
ZXZNGNLLGJJO · Oct 31
$3,879 AUD
$2,725 USD
View
1 more retailer has this diamond
Prices start from $681 AUDSave up to $3,198 AUD

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
$681 AUD