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Round|Lab Grown|IGI

1.28ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG786633884

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786633884

Diamond specifications and retailer prices

From $370 AUD
$260 USD
As of October 29, 2026
Save $3,160 AUD (90%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $3,530 AUD at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG786633884 or 786633884. Listed at 24 retailers as of October 29, 2026, with prices from $370 to $3,530, a $3,160 spread on the same certified stone. Brilliant Earth lists it at $3,530. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786633884
Dimensions6.91 × 6.95 × 4.31 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
6.91 mm6.95 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786633884
Side View
Table 58.0%Crown 35.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.3%

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: Oct 29
Current: $3,530 AUD|Low: $413 AUD|High: $3,530 AUD|Avg: $1,101 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 5$413 AUD
Retailer 3$619 AUD
Retailer 12$683 AUD
Retailer 9$788 AUD
Retailer 4$820 AUD
Retailer 7$825 AUD
Retailer 2$875 AUD
Retailer 8$1,117 AUD
Retailer 11$1,166 AUD
Retailer 10$1,751 AUD
Retailer 6$1,847 AUD
Brilliant Earth$3,530 AUD

41 data points across 12 retailers

24 retailers$370 AUD to $3,530 AUD

A
Cheapest Retailer
-
$370 AUD
$260 USD
A
Retailer 2
-
$413 AUD
$290 USD
View
Final sale: no returns
A
Retailer 3
-
$428 AUD
$301 USD
View
A
Retailer 4
-
$458 AUD
$322 USD
View
A
Retailer 5
-
$458 AUD
$322 USD
View
A
Retailer 6
-
$510 AUD
HK$2,800 HKD
View
A
Retailer 7
-
$619 AUD
$435 USD
View
A
Retailer 8
-
$683 AUD
$480 USD
View
A
Retailer 9
-
$788 AUD
ZAR 8,945 ZAR
View
A
Retailer 10
-
$820 AUD
$576 USD
View
A
Retailer 11
-
$825 AUD
€552 EUR
View
A
Retailer 12
-
$875 AUD
£484 GBP
View
A
Retailer 13
-
$1,033 AUD
$726 USD
View
A
Retailer 14
-
$1,117 AUD
View
B+
Retailer 15
-
$1,166 AUD
$819 USD
View
B+
Retailer 16
-
$1,475 AUD
$1,036 USD
View
B+
Retailer 17
-
$1,481 AUD
SGD 1,406 SGD
View
B+
Retailer 18
-
$1,548 AUD
$1,087 USD
View
B+
Retailer 19
-
$1,614 AUD
$1,134 USD
View
Retailer 20
-
$1,751 AUD
$1,230 USD
View
Price last confirmed 12 days ago
B+
Retailer 21
-
$1,847 AUD
£1,022 GBP
View
B+
Retailer 22
-
$1,971 AUD
$1,385 USD
View
B
Retailer 23
-
$3,254 AUD
£1,800 GBP
View
Most Expensive
B
Brilliant Earth
18980939A · Oct 29
$3,530 AUD
$2,480 USD
View
23 more retailers have this diamond
Prices start from $370 AUDSave up to $3,160 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
$370 AUD