CaratHunter
Plans
Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

VG • D/FL • IGI LG815697866

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

Certificate IGI LG815697866

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: $4,143 AUD at Rare Carat · As of October 21, 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 very-good cut grade and certified by IGI LG815697866 or 815697866. 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. 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815697866
Dimensions7.50 × 5.23 × 3.65 mm
L/W Ratio1.43
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
7.50 mm5.23 mm1.28 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815697866
Side View
Table 70.0%Crown 46°Girdle: MED-STKPavilion 36.8°Culet: NoneDepth 69.8%

Caratlytics Score

How it works →
A
Excellent
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: $4,143 AUD|Low: $386 AUD|High: $4,684 AUD|Avg: $1,638 AUD|+23.9%
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
November 1, 2026
Retailer 5$386 AUD
Retailer 6$436 AUD
Retailer 2$479 AUD
Retailer 14$710 AUD
Retailer 3$972 AUD
Retailer 7$1,094 AUD
Retailer 4$1,119 AUD
Retailer 17$1,189 AUD
Retailer 8$1,274 AUD
Retailer 13$1,361 AUD
Retailer 16$1,367 AUD
Retailer 15$1,566 AUD
Retailer 11$1,877 AUD
Retailer 9$2,232 AUD
Retailer 10$2,861 AUD
Retailer 12$3,260 AUD
Rare Carat$4,143 AUD

20 data points across 17 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
-
$1,877 AUD
£1,038 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
PE1710_l_831604041 · Oct 21
$4,143 AUD
$2,910 USD
View
Price last confirmed 12 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