Oil or fat is an organic compound composes of carbon, hydrogen, and oxygen atoms. Oil is liquid state at room temperature while fat being solid state. Lipids are a triglyceride ester compound of long chain carboxylic acid. Wax is an ester of alcohol (contains 12 carbons and more) and carboxylic acid. Jelly candles are a homogeneous mixture of resin and mineral oil, which is a combination of hydrocarbon compounds.