The phrase "something of mine" is correct and can be used in written English. You can use it when you want to refer to an object or possession that belongs to you. For example: "I recently found something of mine that I had lost years ago.".
There must be something of mine you could wear.
How did he know this? "Because he once retweeted something of mine," Rubio said.
I can always read something of mine and want to spend more time re-writing it.
She has something of mine, and she thinks she has me.
But an entirely different problem presents itself when these neighbors are gifted, as a 30-something friend of mine who lives in a large Upper West Side apartment building discovered shortly after she decided to take up the piano.
While with my girlfriend, I recently made reference to something a friend of mine had said to me about a particularly attractive girl we'd encountered at a party: "I would absolutely ruin her".
The entire episode reminded me of something a friend of mine once said, "The only important thing that writing a thesis taught me was that I have an infinite capacity for making mistakes".
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia