The word "Astone" is pronounced as /əˈstoʊn/. The first sound is a schwa, which is a neutral vowel sound. The letter "s" is pronounced as /s/, followed by the letter "t" pronounced as /t/. The sound of "o" in "Astone" is pronounced as /oʊ/, which is a diphthong that is a combination of "o" and "u". Lastly, the letter "n" is pronounced as /n/. "Astone" is a unique spelling and should not be confused with "astonish" or "astonished".