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Round|Lab Grown|IGI

1.28ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG779630639

Shape and cutting style on the report: Round brilliant

Certificate IGI LG779630639

Diamond specifications and retailer prices

From $379 AUD
$266 USD
As of October 29, 2026
Save $3,151 AUD (89%) vs most expensive(unlock to see where)
25 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 LG779630639 or 779630639. Listed at 25 retailers as of October 29, 2026, with prices from $379 to $3,530, a $3,151 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 angle34.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779630639
Dimensions6.93 × 6.98 × 4.29 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
6.93 mm6.98 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779630639
Side View
Table 59.0%Crown 34.9°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.8%

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: Oct 29
Current: $3,530 AUD|Low: $366 AUD|High: $3,530 AUD|Avg: $1,138 AUD
Brilliant Earth
Retailer 2
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Retailer 24
October 30, 2026
Retailer 22$379 AUD
Retailer 23$423 AUD
Retailer 15$443 AUD
Retailer 11$473 AUD
Retailer 16$473 AUD
Retailer 2$629 AUD
Retailer 9$697 AUD
Retailer 18$759 AUD
Retailer 8$813 AUD
Retailer 12$833 AUD
Retailer 5$846 AUD
Retailer 6$896 AUD
Retailer 19$897 AUD
Retailer 20$1,036 AUD
Retailer 7$1,151 AUD
Retailer 10$1,203 AUD
Retailer 3$1,404 AUD
Retailer 4$1,506 AUD
Retailer 14$1,520 AUD
Retailer 21$1,581 AUD
Retailer 17$1,793 AUD
Retailer 24$1,891 AUD
Retailer 13$1,998 AUD
Brilliant Earth$3,530 AUD

29 data points across 24 retailers

25 retailers$379 AUD to $3,530 AUD

A
Cheapest Retailer
-
$379 AUD
$266 USD
A
Retailer 2
-
$423 AUD
$297 USD
View
Final sale: no returns
A
Retailer 3
-
$443 AUD
$311 USD
View
A
Retailer 4
-
$473 AUD
$332 USD
View
A
Retailer 5
-
$473 AUD
$332 USD
View
A
Retailer 6
-
$528 AUD
HK$2,900 HKD
View
A
Retailer 7
-
$629 AUD
$442 USD
View
A
Retailer 8
-
$697 AUD
$490 USD
View
A
Retailer 9
-
$759 AUD
£420 GBP
View
A
Retailer 10
-
$813 AUD
ZAR 9,225 ZAR
View
A
Retailer 11
-
$833 AUD
$585 USD
View
A
Retailer 12
-
$846 AUD
€566 EUR
View
A
Retailer 13
-
$896 AUD
View
A
Retailer 14
-
$897 AUD
£496 GBP
View
A
Retailer 15
-
$1,036 AUD
$728 USD
View
A
Retailer 16
-
$1,151 AUD
View
B+
Retailer 17
-
$1,203 AUD
$845 USD
View
B+
Retailer 18
-
$1,404 AUD
View
B+
Retailer 19
-
$1,506 AUD
SGD 1,430 SGD
View
B+
Retailer 20
-
$1,520 AUD
$1,068 USD
View
B+
Retailer 21
-
$1,581 AUD
$1,111 USD
View
Retailer 22
-
$1,793 AUD
$1,260 USD
View
Price last confirmed 22 days ago
B+
Retailer 23
-
$1,891 AUD
£1,046 GBP
View
B+
Retailer 24
-
$1,998 AUD
$1,404 USD
View
Most Expensive
B
Brilliant Earth
18530693A · Oct 29
$3,530 AUD
$2,480 USD
View
24 more retailers have this diamond
Prices start from $379 AUDSave up to $3,151 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
$379 AUD