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 $448 USD
As of November 4, 2026
Save $1,402 USD (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,850 USD 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 $448 to $1,850, a $1,402 spread on the same certified stone. Brilliant Earth lists it at $1,850. 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

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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: $1,850 USD|Low: $390 USD|High: $2,700 USD|Avg: $984 USD|-31.5%
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 4, 2026
Retailer 2$448 USD
Retailer 6$450 USD
Retailer 8$528 USD
Retailer 5$545 USD
Retailer 11$579 USD
Retailer 7$601 USD
Retailer 4$663 USD
Retailer 9$704 USD
Retailer 10$1,191 USD
Retailer 12$1,265 USD
Retailer 13$1,348 USD
Retailer 3$1,845 USD
Brilliant Earth$1,850 USD

42 data points across 13 retailers

13 retailers$448 USD to $1,850 USD

A
Cheapest Retailer
-
$448 USD
A
Retailer 2
-
$450 USD
View
A
Retailer 3
-
$528 USD
View
A
Retailer 4
-
$545 USD
View
A
Retailer 5
-
$579 USD
View
A
Retailer 6
-
$601 USD
View
A
Retailer 7
-
$663 USD
View
B+
Retailer 8
-
$704 USD
View
B
Retailer 9
-
$1,191 USD
View
B
Retailer 10
-
$1,265 USD
View
Retailer 11
-
$1,348 USD
View
Price last confirmed 9 days ago
Retailer 12
-
$1,845 USD
View
Price last confirmed 17 days ago
Most Expensive
B
Brilliant Earth
21476681Y · Nov 4
$1,850 USD
View
12 more retailers have this diamond
Prices start from $448 USDSave up to $1,402 USD

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
$448 USD