Star and crescentmodern
Crescent with a star — adopted from Ottoman flags as a general emblem of Islam in the 20th century.
Tradition: islamic, ottoman · Period: Ancient Near East & Byzantium; Ottoman state emblem late 18th c.; "Islamic" symbol 20th c. · Unicode: U+262A
Modern history: NOT scriptural — neither the Qur'an nor the Prophet used it; many Muslims reject it as a religious symbol.
Sources
Image: CC BY-SA 4.0 · Vladikuzasnij · source. Please keep this credit when you use it.