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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG816602405

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG816602405

Diamond specifications and retailer prices

From $479 AUD
£265 GBP
As of November 1, 2026
Save $2,781 AUD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,523 AUD at Rare Carat · As of October 18, 2026
View at Rare Carat

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 top-tier cut grade and certified by IGI LG816602405 or 816602405. Listed at 9 retailers as of October 31, 2026, with a 580% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.8°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816602405
Dimensions7.74 × 5.26 × 3.72 mm
L/W Ratio1.47
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.74 mm5.26 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816602405
Side View
Table 62.0%Crown 38.8°Girdle: MediumPavilion 39.4°Culet: NoneDepth 70.7%

Caratlytics Score

How it works →
A+
Exceptional
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,523 AUD|Low: $386 AUD|High: $4,684 AUD|Avg: $1,625 AUD|+5.4%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 1, 2026
Retailer 5$386 AUD
Retailer 10$436 AUD
Retailer 11$479 AUD
Retailer 15$710 AUD
Retailer 3$972 AUD
Retailer 7$1,094 AUD
Retailer 4$1,119 AUD
Retailer 18$1,189 AUD
Retailer 8$1,274 AUD
Retailer 14$1,361 AUD
Retailer 17$1,367 AUD
Retailer 16$1,566 AUD
Retailer 6$1,844 AUD
Retailer 2$1,866 AUD
Retailer 9$2,232 AUD
Retailer 12$2,861 AUD
Retailer 13$3,260 AUD
Rare Carat$3,523 AUD

21 data points across 18 retailers

9 retailers$479 AUD to $3,260 AUD

A+
Cheapest Retailer
-
$479 AUD
£265 GBP
A
Retailer 2
-
$710 AUD
$499 USD
View
B+
Retailer 3
-
$1,361 AUD
$956 USD
View
Retailer 4
-
$1,367 AUD
$960 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$1,566 AUD
$1,100 USD
View
B+
Retailer 6
-
$1,866 AUD
£1,032 GBP
View
B
Retailer 7
-
$2,861 AUD
$2,010 USD
View
B
Retailer 8
-
$3,260 AUD
$2,290 USD
View
Most Expensive
Rare Carat
PD-217234 · Oct 18
$3,523 AUD
$2,475 USD
View
Price last confirmed 14 days ago
8 more retailers have this diamond
Prices start from $479 AUDSave up to $2,781 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
$479 AUD