Allah Almighty says in Surah al-Hijr:

'And the jinn We created before, from piercing (samum) fire' (Verse 27)

However, the jinn are actually the devil. Just as Adam is the source of man, so is Satan, the source of the jinn.

The jinn have offspring. Allah Most High says in Surah al-Kahf:

'We said to the angels, “Bow down to Adam.” So they bowed down, except for Satan. He was of the jinn, and he defied the command of his Lord. Will you take him and his offspring as lords instead of Me, when they are an enemy to you? Evil is the exchange for the wrongdoers.' (Verse 50)

The jinn see us and we do not see them. Allah says in Surah al-A'raf:

'O Children of Adam! Do not let Satan seduce you, as he drove your parents out of the Garden, stripping them of their garments, to show them their nakedness. He sees you, him and his clan, from where you cannot see them. We have made the devils friends of those who do not believe.' (Verse 27)