Diamonds are formed under great pressure and heat. If these conditions do not exist, they are simply not formed. It is not that they will be low quality, or smaller in size, but they will not form. God brings His refining fire into our lives to create in us what He sees fit. When He sees our lack of character, He will bring into our lives what we need. So next time a fiery trial comes, thank God. He is producing exactly what He knows you need in your life. The only difference between a diamond and a piece of coal is pressure.