CaratHunter
Plans
Round|Lab Grown|IGI

1.28ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG800680138

Shape and cutting style on the report: Round brilliant

Certificate IGI LG800680138

Diamond specifications and retailer prices

From $656 AUD
HK$3,600 HKD
As of October 30, 2026
Save $1,949 AUD (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,605 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800680138 or 800680138. Listed at 12 retailers as of October 29, 2026, with prices from $656 to $2,605, a $1,949 spread on the same certified stone. Brilliant Earth lists it at $2,605. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800680138
Dimensions7.09 × 7.06 × 4.20 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.09 mm7.06 mm1.28 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800680138
Side View
Table 57.0%Crown 33°Girdle: MediumPavilion 40.2°Culet: NoneDepth 59.3%

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: $2,605 AUD|Low: $656 AUD|High: $2,676 AUD|Avg: $1,422 AUD|-2.7%
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 7$656 AUD
Retailer 12$800 AUD
Retailer 8$920 AUD
Retailer 5$927 AUD
Retailer 2$1,005 AUD
Retailer 4$1,062 AUD
Retailer 10$1,063 AUD
Retailer 9$1,283 AUD
Retailer 11$1,883 AUD
Retailer 3$2,151 AUD
Retailer 6$2,280 AUD
Brilliant Earth$2,605 AUD

44 data points across 12 retailers

12 retailers$656 AUD to $2,605 AUD

A
Cheapest Retailer
-
$656 AUD
HK$3,600 HKD
A
Retailer 2
-
$800 AUD
$562 USD
View
A
Retailer 3
-
$920 AUD
$646 USD
View
A
Retailer 4
-
$927 AUD
€620 EUR
View
A
Retailer 5
-
$1,005 AUD
£556 GBP
View
A
Retailer 6
-
$1,062 AUD
View
A
Retailer 7
-
$1,063 AUD
$747 USD
View
B+
Retailer 8
-
$1,283 AUD
$901 USD
View
B+
Retailer 9
-
$1,883 AUD
$1,323 USD
View
B
Retailer 10
-
$2,151 AUD
$1,511 USD
View
B+
Retailer 11
-
$2,280 AUD
£1,261 GBP
View
Most Expensive
B
Brilliant Earth
21143557A · Oct 29
$2,605 AUD
$1,830 USD
View
11 more retailers have this diamond
Prices start from $656 AUDSave up to $1,949 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
$656 AUD