Reflections of His Light
So it is also with the other precious gems. if they are many-sided, they reflect more light and display more beauty. In its crude state the diamond does not reflect light at all. We are in a crude state and are of no use until God comes and shines upon us. The light that is in a diamond is not its own possession; it is the beauty of the sun. What beauty is there in the child of God? Only the beauty of Jesus. We are His peculiar people, chosen to show forth the excellencies of Him who hath called us out of darkness into His marvelous light (1 Peter 2:9). Let us reflect today His light and love.
Where is the way where light dwelleth -- Job 38:19
Days of Heaven Upon Earth, A.B. Simpson
And of course before diamonds can reflect the light they must be subject to intense pressure and breaking...
Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, because you know that the testing of your faith produces perseverance. Let perseverance finish its work so that you may be mature and complete, not lacking anything.
James 1:2-4 NIV