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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731537069

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

Certificate IGI LG731537069

Diamond specifications and retailer prices

From $293 CAD
$209 USD
As of October 27, 2026
Save $3,137 CAD (91%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,429 CAD at Brilliant Earth · As of October 28, 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 top-tier cut grade and certified by IGI LG731537069 or 731537069. Listed at 14 retailers as of October 27, 2026, with prices from $293 to $3,429, a $3,137 spread on the same certified stone. Brilliant Earth lists it at $3,429. 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
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731537069
Dimensions7.61 × 5.54 × 3.54 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
7.61 mm5.54 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731537069
Side View
Table 67.0%Crown 41°Girdle: Slightly ThickPavilion 34.7°Culet: NoneDepth 63.9%

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: Oct 27
Current: $3,429 CAD|Low: $293 CAD|High: $3,541 CAD|Avg: $1,461 CAD|-3.2%
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
Retailer 14
October 29, 2026
Retailer 8$293 CAD
Retailer 2$329 CAD
Retailer 4$340 CAD
Retailer 14$444 CAD
Retailer 12$495 CAD
Retailer 5$647 CAD
Retailer 7$978 CAD
Retailer 11$1,057 CAD
Retailer 3$1,246 CAD
Retailer 13$1,288 CAD
Retailer 9$1,609 CAD
Retailer 6$2,736 CAD
Retailer 10$2,813 CAD
Brilliant Earth$3,429 CAD

32 data points across 14 retailers

14 retailers$293 CAD to $3,429 CAD

A+
Cheapest Retailer
-
$293 CAD
$209 USD
A
Retailer 2
-
$329 CAD
$235 USD
View
Final sale: no returns
A
Retailer 3
-
$340 CAD
$243 USD
View
A
Retailer 4
-
$444 CAD
$317 USD
View
B+
Retailer 5
-
$495 CAD
$354 USD
View
A
Retailer 6
-
$647 CAD
€440 EUR
View
A
Retailer 7
-
$978 CAD
A$1,075 AUD
View
B+
Retailer 8
-
$1,057 CAD
$755 USD
View
B+
Retailer 9
-
$1,246 CAD
$890 USD
View
B+
Retailer 10
-
$1,288 CAD
$920 USD
View
B+
Retailer 11
-
$1,609 CAD
£905 GBP
View
B
Retailer 12
-
$2,736 CAD
$1,955 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
$2,813 CAD
$2,010 USD
View
Most Expensive
B
Brilliant Earth
21405859Y · Oct 28
$3,429 CAD
$2,450 USD
View
13 more retailers have this diamond
Prices start from $293 CADSave up to $3,137 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
$293 CAD