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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG754594875

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

Certificate IGI LG754594875

Diamond specifications and retailer prices

From $367 AUD
As of November 4, 2026
Save $2,618 AUD (88%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $2,986 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

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 IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG754594875 or 754594875. Listed at 25 retailers as of November 4, 2026, with prices from $367 to $2,986, a $2,618 spread on the same certified stone. Brilliant Earth lists it at $2,986. 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
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594875
Dimensions7.95 × 5.39 × 3.46 mm
L/W Ratio1.47
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
7.95 mm5.39 mm1.28 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594875
Side View
Table 60.0%Crown 42.5°Girdle: MED-STKPavilion 32.7°Culet: NoneDepth 64.2%

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: Nov 4
Current: $2,986 AUD|Low: $367 AUD|High: $3,243 AUD|Avg: $1,180 AUD|-7.9%
Brilliant Earth
Retailer 2
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November 6, 2026
Retailer 22$367 AUD
Retailer 10$426 AUD
Retailer 18$454 AUD
Retailer 13$464 AUD
Retailer 21$530 AUD
Retailer 6$643 AUD
Retailer 20$686 AUD
Retailer 8$754 AUD
Retailer 14$827 AUD
Retailer 2$859 AUD
Retailer 11$1,006 AUD
Retailer 12$1,114 AUD
Retailer 17$1,216 AUD
Retailer 4$1,396 AUD
Retailer 3$1,461 AUD
Retailer 23$1,533 AUD
Retailer 7$1,536 AUD
Retailer 9$1,687 AUD
Retailer 19$1,816 AUD
Retailer 16$1,817 AUD
Retailer 5$1,961 AUD
Retailer 15$2,657 AUD
Brilliant Earth$2,986 AUD

30 data points across 23 retailers

25 retailers$367 AUD to $2,986 AUD

A
Cheapest Retailer
-
$367 AUD
A
Retailer 2
-
$426 AUD
View
A
Retailer 3
-
$454 AUD
View
Final sale: no returns
A
Retailer 4
-
$454 AUD
View
A
Retailer 5
-
$464 AUD
View
A
Retailer 6
-
$530 AUD
View
A
Retailer 7
-
$643 AUD
View
A
Retailer 8
-
$686 AUD
View
A
Retailer 9
-
$754 AUD
View
A
Retailer 10
-
$827 AUD
View
A
Retailer 11
-
$841 AUD
View
A
Retailer 12
-
$859 AUD
View
B+
Retailer 13
-
$1,006 AUD
View
B+
Retailer 14
-
$1,114 AUD
View
B+
Retailer 15
-
$1,216 AUD
View
B
Retailer 16
-
$1,396 AUD
View
B+
Retailer 17
-
$1,461 AUD
View
B+
Retailer 18
-
$1,533 AUD
View
B+
Retailer 19
-
$1,536 AUD
View
B
Retailer 20
-
$1,687 AUD
View
B+
Retailer 21
-
$1,816 AUD
View
Retailer 22
-
$1,817 AUD
View
Price last confirmed 29 days ago
B
Retailer 23
-
$1,961 AUD
View
Retailer 24
-
$2,657 AUD
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
17981344A · Nov 4
$2,986 AUD
$2,090 USD
View
24 more retailers have this diamond
Prices start from $367 AUDSave up to $2,618 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
$367 AUD