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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG788625367

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

Certificate IGI LG788625367

Diamond specifications and retailer prices

From $479 AUD
£265 GBP
As of November 2, 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 LG788625367 or 788625367. Listed at 9 retailers as of November 1, 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.7°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788625367
Dimensions7.58 × 5.52 × 3.70 mm
L/W Ratio1.37
Culet sizePointed
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
7.58 mm5.52 mm1.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788625367
Side View
Table 66.0%Crown 40.7°Girdle: MediumPavilion 36.9°Culet: NoneDepth 67.0%

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 2
Current: $3,523 AUD|Low: $367 AUD|High: $4,684 AUD|Avg: $1,638 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
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Retailer 18
November 2, 2026
Retailer 4$367 AUD
Retailer 6$414 AUD
Retailer 2$479 AUD
Retailer 14$710 AUD
Retailer 3$952 AUD
Retailer 9$1,094 AUD
Retailer 18$1,132 AUD
Retailer 10$1,203 AUD
Retailer 5$1,264 AUD
Retailer 13$1,361 AUD
Retailer 17$1,367 AUD
Retailer 16$1,566 AUD
Retailer 15$1,868 AUD
Retailer 7$2,134 AUD
Retailer 8$2,343 AUD
Retailer 11$2,861 AUD
Retailer 12$3,260 AUD
Rare Carat$3,523 AUD

23 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
-
$1,868 AUD
£1,033 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
MR-186136 · 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