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Cushion|Lab Grown|IGI

3.05ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG529243211

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG529243211

Diamond specifications and retailer prices

From $897 AUD
$630 USD
As of October 29, 2026
Save $5,609 AUD (86%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,506 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.05ct lab-grown cushion diamond

This 3.05ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG529243211 or 529243211. Listed at 8 retailers as of October 29, 2026, with prices from $897 to $6,506, a $5,609 spread on the same certified stone. Brilliant Earth lists it at $6,506. 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

3.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG529243211
Dimensions8.60 × 7.86 × 5.22 mm
L/W Ratio1.09
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
8.60 mm7.86 mm3.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG529243211
Side View
Table 64.5%Crown 33°Girdle: THK-VTKPavilion 34.3°Culet: NoneDepth 66.4%

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: $6,506 AUD|Low: $616 AUD|High: $6,705 AUD|Avg: $2,514 AUD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7$897 AUD
Retailer 4$1,146 AUD
Retailer 6$1,387 AUD
Retailer 5$1,530 AUD
Retailer 2$1,549 AUD
Retailer 3$4,334 AUD
Brilliant Earth$6,506 AUD

40 data points across 7 retailers

8 retailers$897 AUD to $6,506 AUD

A
Cheapest Retailer
-
$897 AUD
$630 USD
Final sale: no returns
A
Retailer 2
-
$1,146 AUD
$805 USD
View
A
Retailer 3
-
$1,387 AUD
$974 USD
View
B+
Retailer 4
-
$1,530 AUD
$1,075 USD
View
A
Retailer 5
-
$1,549 AUD
£857 GBP
View
B
Retailer 6
-
$3,207 AUD
HK$17,600 HKD
View
B
Retailer 7
-
$4,334 AUD
£2,397 GBP
View
Most Expensive
B
Brilliant Earth
17971335A · Oct 29
$6,506 AUD
$4,570 USD
View
7 more retailers have this diamond
Prices start from $897 AUDSave up to $5,609 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
3.05ct Cushion
$897 AUD