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Cushion|Lab Grown|IGI

3.12ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG567368333

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG567368333

Diamond specifications and retailer prices

From $1,089 AUD
$765 USD
As of October 29, 2026
Save $4,281 AUD (80%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $5,370 AUD at B2C Jewels · As of October 26, 2026
View at B2C Jewels

About this 3.12ct lab-grown cushion diamond

This 3.12ct 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 LG567368333 or 567368333. Listed at 8 retailers as of October 26, 2026, with prices from $1,089 to $5,370, a $4,281 spread on the same certified stone. B2C Jewels lists it at $5,370. 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

3.12
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG567368333
Dimensions8.75 × 8.39 × 5.20 mm
L/W Ratio1.04
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
8.75 mm8.39 mm3.12 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG567368333
Side View
Table 62.5%Crown 35°Girdle: THN-STKPavilion 35.1°Culet: NoneDepth 62.0%

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: $1,404 AUD|Low: $1,025 AUD|High: $5,370 AUD|Avg: $1,954 AUD|-73.9%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 5$1,089 AUD
Retailer 2$1,092 AUD
Retailer 4$1,382 AUD
B2C Jewels$1,404 AUD
Retailer 3$1,481 AUD
Retailer 6$1,547 AUD
Retailer 7$2,896 AUD

5 data points across 7 retailers

8 retailers$1,089 AUD to $5,370 AUD

A
Cheapest Retailer
-
$1,089 AUD
$765 USD
A
Retailer 2
-
$1,092 AUD
£604 GBP
View
A
Retailer 3
-
$1,382 AUD
$971 USD
View
A
Retailer 4
-
$1,404 AUD
$986 USD
View
A
Retailer 5
-
$1,481 AUD
£819 GBP
View
A
Retailer 6
-
$1,547 AUD
$1,087 USD
View
B
Retailer 7
-
$2,990 AUD
$2,100 USD
View
Most Expensive
B
B2C Jewels
21586996 · Oct 26
$5,370 AUD
$3,772 USD
View
7 more retailers have this diamond
Prices start from $1,089 AUDSave up to $4,281 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
3.12ct Cushion
$1,089 AUD