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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

GD • D/FL

Diamond specifications and retailer prices

From $340 AUD
$239 USD
As of October 30, 2026
Save $2,319 AUD (87%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $2,659 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI. Listed at 5 retailers as of October 30, 2026, with prices from $340 to $2,659, a $2,319 spread on the same certified stone. Blue Nile lists it at $2,659. 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

1.28
Carat
D
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.74 × 5.26 × 3.72 mm
L/W Ratio1.47
Top View
7.74 mm5.26 mm1.28 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 62.0%CrownGirdle: MediumPavilionCulet: NoneDepth 70.7%

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: Oct 30
Current: $2,659 AUD|Low: $340 AUD|High: $3,829 AUD|Avg: $1,701 AUD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 27, 2026
Retailer 2$340 AUD
Retailer 5$394 AUD
Retailer 3$766 AUD
Retailer 4$1,496 AUD
Blue Nile$2,659 AUD
Retailer 6$3,829 AUD

12 data points across 6 retailers

5 retailers$340 AUD to $2,659 AUD

A
Cheapest Retailer
-
$340 AUD
$239 USD
A
Retailer 2
-
$394 AUD
$277 USD
View
B+
Retailer 3
-
$766 AUD
$538 USD
View
B+
Retailer 4
-
$1,496 AUD
$1,051 USD
View
Most Expensive
C
Blue Nile
30353400 · Oct 31
$2,659 AUD
$1,868 USD
View
4 more retailers have this diamond
Prices start from $340 AUDSave up to $2,319 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
1.28ct Radiant
$340 AUD