Pressure

Pressure, turns coal into diamonds.
We all want to be diamonds, but in all honesty, none of us are coal.
We are gem stones - rubies, sapphires or emeralds. We might not be pristine and always desired but we are all beautiful in our own way. We might not be flawless like diamonds, each of us have imperfections and faults we might want to change. But in all honesty, if all of us were diamonds, then these rocks would lose their value and no longer be special. If all of us were diamonds, life would be boring and none of us would be desired.
Stop trying to make a diamond, there is only a certain amount of pressure I can take.
Stop thinking that I have to be the best stone, when what I am currently is perfectly fine. Stop suggesting that you want something more pristine, more beautiful, more amazing - simply so you can gloat.
I'm not a diamond, nor do I want to be. I'm happy the way I am and if I am starting to flaw, I'll polish myself, don't you worry about that.