Radiant|Lab Grown|IGI

1.28ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG732507011

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

Certificate IGI LG732507011

Diamond specifications and retailer prices

From $289 USD
As of October 30, 2026
Save $1,751 USD (86%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $2,040 USD 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG732507011 or 732507011. Listed at 24 retailers as of October 29, 2026, with prices from $289 to $2,040, a $1,751 spread on the same certified stone. Brilliant Earth lists it at $2,040. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG732507011
Dimensions7.79 × 5.28 × 3.59 mm
L/W Ratio1.48
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.79 mm5.28 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG732507011
Side View
Table 65.0%Crown 43.2°Girdle: MED-STKPavilion 35.4°Culet: NoneDepth 68.0%

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: Oct 30
Current: $2,040 USD|Low: $277 USD|High: $2,040 USD|Avg: $807 USD
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
Retailer 15
October 30, 2026
Retailer 4$289 USD
Retailer 7$323 USD
Retailer 5$358 USD
Retailer 3$482 USD
Retailer 11$515 USD
Retailer 14$606 USD
Retailer 6$609 USD
Retailer 10$615 USD
Retailer 2$633 USD
Retailer 9$874 USD
Retailer 15$1,100 USD
Retailer 8$1,130 USD
Retailer 12$1,438 USD
Retailer 13$1,495 USD
Brilliant Earth$2,040 USD

42 data points across 15 retailers

24 retailers$289 USD to $2,040 USD

A
Cheapest Retailer
-
$289 USD
A
Retailer 2
-
$323 USD
View
Final sale: no returns
A
Retailer 3
-
$335 USD
View
A
Retailer 4
-
$358 USD
View
A
Retailer 5
-
$358 USD
View
A
Retailer 6
-
$482 USD
View
A
Retailer 7
-
$515 USD
View
Retailer 8
-
$606 USD
€577 EUR
View
Price last confirmed 7 days ago
A
Retailer 9
-
$609 USD
View
A
Retailer 10
-
$615 USD
ZAR 9,943 ZAR
View
A
Retailer 11
-
$633 USD
£499 GBP
View
B+
Retailer 12
-
$874 USD
A$1,344 AUD
View
B+
Retailer 13
-
$881 USD
View
B+
Retailer 14
-
$1,100 USD
View
B+
Retailer 15
-
$1,130 USD
A$1,738 AUD
View
B+
Retailer 16
-
$1,151 USD
View
B+
Retailer 17
-
$1,200 USD
View
B+
Retailer 18
-
$1,275 USD
View
B
Retailer 19
-
$1,402 USD
£1,104 GBP
View
B+
Retailer 20
-
$1,438 USD
£1,132 GBP
View
B
Retailer 21
-
$1,477 USD
View
Retailer 22
-
$1,495 USD
View
Price last confirmed 9 days ago
Retailer 23
-
$1,845 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
15733199A · Oct 29
$2,040 USD
View
23 more retailers have this diamond
Prices start from $289 USDSave up to $1,751 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
$289 USD