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Radiant|Lab Grown|IGI

1.28ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG758557943

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

Certificate IGI LG758557943

Diamond specifications and retailer prices

From $3,032 AUD
$2,130 USD
As of October 31, 2026
3 retailers carry this diamond
Most expensive: $3,032 AUD at Brilliant Earth
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 LG758557943 or 758557943. Listed at 3 retailers as of October 31, 2026. 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
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758557943
Dimensions7.72 × 5.53 mm
L/W Ratio1.40
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
7.72 mm5.53 mm1.28 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG758557943
Side View
Table 63.0%Crown 41.5°Girdle: MED-STKPavilion 33.8°Culet: NoneDepth 64.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $3,032 AUD|Low: $241 AUD|High: $3,602 AUD|Avg: $1,197 AUD|-15.8%
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
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Retailer 16
September 15, 2026
Retailer 12$241 AUD
Retailer 5$282 AUD
Retailer 8$555 AUD
Retailer 10$703 AUD
Retailer 16$710 AUD
Retailer 9$728 AUD
Retailer 2$802 AUD
Retailer 11$867 AUD
Retailer 13$1,100 AUD
Retailer 4$1,236 AUD
Retailer 14$1,237 AUD
Retailer 7$1,423 AUD
Retailer 6$1,491 AUD
Retailer 3$1,605 AUD
Retailer 15$2,085 AUD
Brilliant Earth$3,032 AUD

59 data points across 16 retailers

3 retailers

Retailer 1
-
$1,100 AUD
Price last confirmed 74 days ago
Retailer 2
-
$2,085 AUD
$1,465 USD
View
Price last confirmed 53 days ago
Most Expensive
B
Brilliant Earth
16995238A · Oct 31
$3,032 AUD
$2,130 USD
View
2 more retailers have this diamond

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.

B
1.28ct Radiant
$3,032 AUD