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To be honest, I never understood the whole voltage-current-resistor thing. I know what each of them is but I cant work with it so I need some help here. Have installed 10 white 5mm LEDs in the ring, eight white LEDs in the main crystal and one blue LED in the main crystal. all of them are soldered in a parallel circuit. I later want to use a 9V battery block to power the thing.

My problem: What resistors do I use? I also kinda messed up because I lost anything that contains information about what the LEDs can handle so I guess one needs to stick to average values.

tl;dr What resistors do I use?