What materials are Jinns created of?

Allah has created humans from clay, angels from light, and Jinns from fire. The common factor between Jinns and angels is that both can appear in any form and shape; human, however, does not possess this ability. This appearance of angels is always of a pure kind, whereas Jinns may be impure. Angels possess only intellect, whereas Jinns possess intellect and desire like humans. This would further imply that due to their desires, Jinns are not always pure, there are 37 instances in the Holy Qur'an where Jinns have been mentioned. As the Qur'an says,  "And the Jinn We created before, of intensely hot fire..." (15:27) Another instance about the creation of Jinn mentioned in the Holy Qur'an is, "And He created Jinns from fire free of smoke." (55:15) Thus, it is firmly established that Jinns are created by hot fire, free from smoke.