Be verb + of

English as a Second Language English Vocabulary, Grammar and Idioms
1

What Tony thinks about this business is of no importance at all.
Everything is of use to a housekeeper.
He is of Chinese-American origin.
He is of the top drawer when it comes to book editors.

↑

I’m not sure of the usage of “of” placing right after be-verb.
Please teach!!

Thanks

2

16.You use of after the verb `be’ to indicate a characteristic or quality that someone or something has. Preposition ‘be’ PREP n formal
■The crisis faced over the next few months is of an entirely different scale.
■Both world wars were of unquestionable importance as economic events
Google dictionary

3

So, can I say “She is of beauty.” instead of “She is beautiful.”?

4

She is a person of beauty.
She is a creature of beauty.
You might even say, “She is a thing of beauty”.

However “she is of beauty,” would not be correct. You could say “She is a beauty,” though.

5

So, “of” makes the sentence formal?
Is it also OK if I say “He is the top drawer when it comes to book editors.”
instead of “He is of the top drawer when it comes to book editors.” ?