word choice - Honorific prefixes: 「ご」 vs 「お」

Some nouns take the 「ご」 prefix:

ご両親 {りょうしん}
ご家族 {かぞく}
ご無事 {ぶじ}
ご安心 {あんしん}

ご丁寧 {ていねい}

While many others take the 「お」 prefix:

お母さん
お仕事 {しごと}
お月 {つき}さま
お家 {うち}
お客 {きゃく}

In general, what are the criteria that determine whether a noun takes a 「ご」 or an 「お」?

Answer

Most generally:

• Words of Chinese (On-yomi) origin take ご


• Words of Japanese (Kun-yomi) origin take お

If I recall correctly, there are also a very few chinese-origin words which take お as they are very commonly used, but I can't think of any of these off the top of my head.

Edit: One such example is お電話.