All Candles are not the same : eBay Guides

Most name brand candles out there are made of 100% paraffin wax. Paraffin is a byproduct of Petroleum which is chock full of carcinogens. It is true that burning anything will have some level carcinogens in them, heck..just breathing can cause cancer, you do not need to expoentially raise your chances by burning 100% paraffin. It is best to stay with other natural waxes, like Soy, Palm or Beeswax. The lower the percentage of Paraffin, the better. Paraffin is needed is most candles to come percentage for absorbing scent oils and keeping the cost down.