There exists some 200 species of jasmine. Jasmine oils are extracted commercially from the jasmine Zambac (Arabian Jasmine) and jasmin grandiflorum (Common Jasmine).
Jasmine oil cannot be extracted by steam distillation. The main modern comercial method of extracting Jasmine oil is via solvent extraction.
Jasmine concrete is produced by solvent extraction of the fresh flowers.
Concrete of Jasmine sambac is a deep orange translucent mass of a jam like consistency. The sambac smells heady and intoxicating. Deep exotic floral with indolic, animalic undertones.
Concrete of grandiflorum is dark orange mass of jam like consistency. Grandiflorum is heady, intoxicating and fruity an exotic floral with peachy fruity notes.
Jasmine absolute is extracted from the concrete using alcohol.
Jasmine wax is a by product of this process.
Jasmine flowers of all varieties can be tinctured for use in perfumery.
Dried jasmine flowers usually don't have much of a smell and are mainly used in tea.