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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG762546104

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

Certificate IGI LG762546104

Diamond specifications and retailer prices

From $640 AUD
As of November 4, 2026
Save $2,003 AUD (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,643 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 LG762546104 or 762546104. Listed at 13 retailers as of November 4, 2026, with prices from $640 to $2,643, a $2,003 spread on the same certified stone. Brilliant Earth lists it at $2,643. 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 angle41.9°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762546104
Dimensions5.45 × 5.45 × 3.47 mm
L/W Ratio1.00
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
5.45 mm5.45 mm1.28 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762546104
Side View
Table 66.0%Crown 41.9°Girdle: MediumPavilion 33.3°Culet: NoneDepth 63.7%

Caratlytics Score

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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: $2,643 AUD|Low: $557 AUD|High: $3,614 AUD|Avg: $1,395 AUD|-26.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 7$640 AUD
Retailer 8$643 AUD
Retailer 9$754 AUD
Retailer 5$779 AUD
Retailer 12$827 AUD
Retailer 2$859 AUD
Retailer 6$943 AUD
Retailer 10$1,006 AUD
Retailer 11$1,701 AUD
Retailer 13$1,807 AUD
Retailer 3$1,926 AUD
Retailer 4$2,636 AUD
Brilliant Earth$2,643 AUD

43 data points across 13 retailers

13 retailers$640 AUD to $2,643 AUD

A
Cheapest Retailer
-
$640 AUD
A
Retailer 2
-
$643 AUD
View
A
Retailer 3
-
$754 AUD
View
A
Retailer 4
-
$779 AUD
View
A
Retailer 5
-
$827 AUD
View
A
Retailer 6
-
$859 AUD
View
A
Retailer 7
-
$943 AUD
View
B+
Retailer 8
-
$1,006 AUD
View
B
Retailer 9
-
$1,701 AUD
View
B
Retailer 10
-
$1,807 AUD
View
Retailer 11
-
$1,926 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
$2,636 AUD
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
21476681Y · Nov 4
$2,643 AUD
$1,850 USD
View
12 more retailers have this diamond
Prices start from $640 AUDSave up to $2,003 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
$640 AUD