Is the worst and lowest rank you get this from loosing lots of matches and have almost no wins
is your loss games are more than your wins
saying your win loss average is 50%
To get gold is to have more than a 60%
win loss average this rank can put you with any other ranks
To get this rank you must have a 70% win loss average this puts you with only people higher than your rank or the same rank.
This rank is one of the most respective rank having a 80 to 90 percent win loss average
Onyx is pretty much the highest ranks having a 90 to 100 percent win loss you are ranked with the top players in the world
Is the best rank you can only get this rank by having Onyx by winning all of your games and ranking your diamond rank up.
All ranks can be brought up by going through all of the stages.