The industrial piercing is two or more separate rim (or cartilage) piercings that are joined by one barbell.
This procedure can be performed as separate piercings with separate jewellery and allowed to heal individually; but can also be fitted with one PTFE barbell, which will decrease the amount of tension placed on the structure of the cartilage itself.
The piercer should carefully mark and plan the piercing so the gauge is suitable for all the tissue it travels though.
1.6mm gauge is probably the wisest choice.
Healing Time: 8 - 16 weeks
Ear cartilage piercings generally take longer to heal than lobe piercings.
This is often due to a combination of things, such as the location of the piercing in the cartilage, the type of jewellery used and the tension that jewellery creates to the structure of the cartilage.
Using biocompatible plastics (like PTFE), cleaning cartilage regularly, and increasing your intake of minerals will certainly benefit your piercing; however a piercing will almost always be doomed to failure if improper jewellery and poor planning are used and left unmonitored.