Righto, the Prizms are the rainbows,which of course is wavelengths of the different colours when you split light with a prism.
Here is the prism of science in action!
You've got 7 (can vary) different versions of each card. A common (Usually White), and then the limited variations, which are called Refractors. You've got a card limited to 200 (Usually Blue), a card limited to 100 (Usually Red), a card limited to 50 (Usually Green), a card limited to 25 (Usually Yellow), a card limited to 5 (Pick your own colour here) and finally, the big one, the 1/1 Black.
Why those colours?
As you can see, Danny boy, if you want the Full Gazza, you're gonna have a lot of competition for that Black, because there's only one Gary Ablett! Wait...
Once you get the black, you should have a far easier time getting the rest of the rainbow.
If I recall correctly, there are some members here with rainbows, and they are more than proud to show them off.
Here is an example of Harvard Boy Jeremy Lin:
Quite impressive, eh?
The most significant aspect to be taken from the Prism exercise is the existence of an AFL 1/1. Something Select will never do.
I hope that helps...
Because I'm not even a collector of this.