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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG800678621

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

Certificate IGI LG800678621

Diamond specifications and retailer prices

From $751 CAD
HK$4,200 HKD
As of November 1, 2026
Save $3,888 CAD (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,639 CAD at Brilliant Earth · As of November 2, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800678621 or 800678621. Listed at 13 retailers as of November 1, 2026, with prices from $751 to $4,639, a $3,888 spread on the same certified stone. Brilliant Earth lists it at $4,639. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800678621
Dimensions8.14 × 5.39 × 3.46 mm
L/W Ratio1.51
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
8.14 mm5.39 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800678621
Side View
Table 63.0%Crown 40.2°Girdle: MediumPavilion 33.9°Culet: NoneDepth 64.2%

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: $4,639 CAD|Low: $751 CAD|High: $4,639 CAD|Avg: $1,694 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4$751 CAD
Retailer 12$919 CAD
Retailer 8$980 CAD
Retailer 6$1,049 CAD
Retailer 2$1,121 CAD
Retailer 5$1,176 CAD
Retailer 10$1,245 CAD
Retailer 9$1,495 CAD
Retailer 11$2,145 CAD
Retailer 3$2,508 CAD
Retailer 7$2,554 CAD
Brilliant Earth$4,639 CAD

44 data points across 12 retailers

13 retailers$751 CAD to $4,639 CAD

A
Cheapest Retailer
-
$751 CAD
HK$4,200 HKD
A
Retailer 2
-
$919 CAD
$658 USD
View
A
Retailer 3
-
$980 CAD
$701 USD
View
A
Retailer 4
-
$1,049 CAD
€715 EUR
View
A
Retailer 5
-
$1,121 CAD
ZAR 12,965 ZAR
View
B+
Retailer 6
-
$1,176 CAD
£662 GBP
View
A
Retailer 7
-
$1,245 CAD
$891 USD
View
B+
Retailer 8
-
$1,495 CAD
$1,070 USD
View
B+
Retailer 9
-
$2,145 CAD
$1,535 USD
View
B+
Retailer 10
-
$2,508 CAD
$1,795 USD
View
B+
Retailer 11
-
$2,554 CAD
£1,439 GBP
View
Retailer 12
-
$3,284 CAD
$2,350 USD
View
Price last confirmed 74 days ago
Most Expensive
B
Brilliant Earth
20634873A · Nov 2
$4,639 CAD
$3,320 USD
View
12 more retailers have this diamond
Prices start from $751 CADSave up to $3,888 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
$751 CAD