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Round|Lab Grown|IGI

1.28ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG668433294

Shape and cutting style on the report: Round brilliant

Certificate IGI LG668433294

Diamond specifications and retailer prices

From $345 AUD
As of November 5, 2026
Save $2,071 AUD (86%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $2,416 AUD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG668433294 or 668433294. Listed at 23 retailers as of November 5, 2026, with prices from $345 to $2,416, a $2,071 spread on the same certified stone. Brilliant Earth lists it at $2,416. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668433294
Dimensions6.94 × 6.98 × 4.32 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.94 mm6.98 mm1.28 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668433294
Side View
Table 57.0%Crown 35.4°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
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 5
Current: $2,416 AUD|Low: $330 AUD|High: $2,780 AUD|Avg: $979 AUD|-13.1%
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 6, 2026
Retailer 12$345 AUD
Retailer 5$386 AUD
Retailer 3$428 AUD
Retailer 13$575 AUD
Retailer 2$723 AUD
Retailer 6$768 AUD
Retailer 4$780 AUD
Retailer 7$793 AUD
Retailer 11$1,045 AUD
Retailer 10$1,378 AUD
Retailer 9$1,601 AUD
Retailer 8$1,707 AUD
Brilliant Earth$2,416 AUD

43 data points across 13 retailers

23 retailers$345 AUD to $2,416 AUD

A
Cheapest Retailer
-
$345 AUD
A
Retailer 2
-
$386 AUD
View
Final sale: no returns
A
Retailer 3
-
$400 AUD
View
Retailer 4
-
$428 AUD
View
Price last confirmed 13 days ago
A
Retailer 5
-
$428 AUD
View
A
Retailer 6
-
$483 AUD
View
A
Retailer 7
-
$575 AUD
View
A
Retailer 8
-
$723 AUD
View
A
Retailer 9
-
$768 AUD
View
A
Retailer 10
-
$780 AUD
View
A
Retailer 11
-
$793 AUD
View
B+
Retailer 12
-
$1,020 AUD
View
B+
Retailer 13
-
$1,045 AUD
View
B+
Retailer 14
-
$1,137 AUD
View
B+
Retailer 15
-
$1,374 AUD
View
B+
Retailer 16
-
$1,378 AUD
View
B+
Retailer 17
-
$1,378 AUD
View
B+
Retailer 18
-
$1,448 AUD
View
B+
Retailer 19
-
$1,485 AUD
View
B
Retailer 20
-
$1,601 AUD
View
B+
Retailer 21
-
$1,707 AUD
View
B
Retailer 22
-
$2,372 AUD
View
Most Expensive
B
Brilliant Earth
15028331A · Nov 5
$2,416 AUD
$1,660 USD
View
22 more retailers have this diamond
Prices start from $345 AUDSave up to $2,071 AUD

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 Round
$345 AUD