Why am I a stone ?

Why am I a stone , while others are precious diamonds? No matter how hard i try i never seem to shine, No matter how much effort i put on, I never seem to shine. I've always wished to be a gem, to at least be on the spotlight, But i could never be there because I get so shy and scared ,always overthinking , "What if i do this wrong?" or "what if i mess things up?" I've never been perfect, nobody has been perfect, but we all know that we're all special , in our ways . I wish that I was a gem , I wish that I was a diamond , but I'll never be one because...Im just a stone.