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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 $645 CAD
HK$3,600 HKD
As of October 30, 2026
Save $2,784 CAD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,429 CAD at Brilliant Earth · As of October 29, 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 October 29, 2026, with prices from $645 to $3,429, a $2,784 spread on the same certified stone. Brilliant Earth lists it at $3,429. 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
Color
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

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: Oct 30
Current: $3,429 CAD|Low: $546 CAD|High: $3,779 CAD|Avg: $1,387 CAD|-9.3%
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
October 30, 2026
Retailer 3$645 CAD
Retailer 12$665 CAD
Retailer 4$763 CAD
Retailer 10$776 CAD
Retailer 7$808 CAD
Retailer 6$827 CAD
Retailer 13$928 CAD
Retailer 5$1,048 CAD
Retailer 11$1,747 CAD
Retailer 2$1,771 CAD
Retailer 8$1,888 CAD
Retailer 9$2,582 CAD
Brilliant Earth$3,429 CAD

41 data points across 13 retailers

13 retailers$645 CAD to $3,429 CAD

A
Cheapest Retailer
-
$645 CAD
HK$3,600 HKD
A
Retailer 2
-
$665 CAD
$475 USD
View
A
Retailer 3
-
$763 CAD
$545 USD
View
A
Retailer 4
-
$776 CAD
€528 EUR
View
A
Retailer 5
-
$808 CAD
ZAR 9,332 ZAR
View
A
Retailer 6
-
$827 CAD
£465 GBP
View
A
Retailer 7
-
$928 CAD
$663 USD
View
B+
Retailer 8
-
$1,048 CAD
$749 USD
View
B
Retailer 9
-
$1,747 CAD
$1,249 USD
View
B
Retailer 10
-
$1,771 CAD
A$1,947 AUD
View
B
Retailer 11
-
$1,888 CAD
£1,062 GBP
View
Retailer 12
-
$2,582 CAD
$1,845 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
21476681Y · Oct 29
$3,429 CAD
$2,450 USD
View
12 more retailers have this diamond
Prices start from $645 CADSave up to $2,784 CAD

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
$645 CAD