Curious is there a standard and what is the difference in say color. If platinum is under say 90 what else is in it? The higher the percentage the better the color? Trying to understand the whole thing as I am clueless about the whole thing. Would love some input on some experience with platinum purchases. Also I heard it is stronger than gold, I need to learn as much as I can before I chose platinum to set my diamond in. Thanks for listening.