Soapstone Oil Burners are my preferred choice for naturally heating incense resins.

Soapstone generates a calming soothing energy that can benefit the owner, it has said to aid with the shaking off of old outdated patterns and habits assisting it's owner in finding a more constructive path. It is said to be the perfect stone to have around you during a process of change, emotionally or physically to help smooth the way retain a sense of calm. It is also thought to inspire being open to a different approch to life.