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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG654412899

Shape and cutting style on the report: Round brilliant

Certificate IGI LG654412899

Diamond specifications and retailer prices

From $218 AUD
$153 USD
As of October 29, 2026
Save $1,267 AUD (85%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,884 AUD at Rare Carat · As of August 9, 2026
View at Rare Carat

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG654412899 or 654412899. Listed at 22 retailers as of October 29, 2026, with a 581% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.09
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654412899
Dimensions6.60 × 6.56 × 4.08 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
6.60 mm6.56 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654412899
Side View
Table 56.0%Crown 35.9°Girdle: MediumPavilion 40.5°Culet: NoneDepth 62.1%

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 29
Current: $598 AUD|Low: $171 AUD|High: $1,484 AUD|Avg: $664 AUD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 7$218 AUD
Retailer 5$243 AUD
Retailer 3$269 AUD
Retailer 15$269 AUD
Retailer 9$441 AUD
Retailer 2$469 AUD
Retailer 16$493 AUD
Retailer 11$526 AUD
Rare Carat$598 AUD
Retailer 14$621 AUD
Retailer 12$683 AUD
Retailer 13$726 AUD
Retailer 4$733 AUD
Retailer 8$867 AUD
Retailer 6$945 AUD
Retailer 10$1,267 AUD
Retailer 17$1,484 AUD

44 data points across 17 retailers

22 retailers$218 AUD to $1,484 AUD

Retailer 1
-
$215 AUD
$151 USD
Price last confirmed 38 days ago
A
Retailer 2
-
$218 AUD
$153 USD
View
A
Retailer 3
-
$243 AUD
$171 USD
View
Final sale: no returns
Retailer 4
-
$263 AUD
$185 USD
View
Price last confirmed 38 days ago
A
Retailer 5
-
$269 AUD
$189 USD
View
A
Retailer 6
-
$269 AUD
$189 USD
View
A
Retailer 7
-
$441 AUD
$310 USD
View
A
Retailer 8
-
$469 AUD
£259 GBP
View
A
Retailer 9
-
$493 AUD
$346 USD
View
B+
Retailer 10
-
$526 AUD
€352 EUR
View
B+
Retailer 11
-
$598 AUD
$420 USD
View
B+
Retailer 12
-
$621 AUD
$436 USD
View
B+
Retailer 13
-
$683 AUD
View
Retailer 14
-
$726 AUD
$510 USD
View
Price last confirmed 14 days ago
B+
Retailer 15
-
$733 AUD
$515 USD
View
Retailer 16
-
$821 AUD
$577 USD
View
Price last confirmed 38 days ago
Retailer 17
-
$860 AUD
$604 USD
View
Price last confirmed 39 days ago
B
Retailer 18
-
$867 AUD
$609 USD
View
B
Retailer 19
-
$945 AUD
$664 USD
View
B
Retailer 20
-
$1,267 AUD
£701 GBP
View
B
Retailer 21
-
$1,484 AUD
$1,043 USD
View
Most Expensive
Rare Carat
26153 · Aug 9
$9,884 AUD
$6,943 USD
View
Price under review
21 more retailers have this diamond
Prices start from $218 AUDSave up to $1,267 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
1.09ct Round
$218 AUD