Well, breed a level 6-10 fire and magic dragon to get a planet
There is no way on dragon vale or dragon story
To create a purple dragon in Dragon Story: Fairy Tail, you will need to breed dragons with purple traits or colors. Try combining dragons with purple elements such as the Amethyst Dragon or the Twilight Dragon to increase the chances of getting a purple dragon offspring. Experiment with different combinations until you successfully breed a purple dragon.
Forest & Desert dragon should make an Armor dragon in Little Dragons.
you can't make metal dragons, you have to buy them
mud dragon+dark dragon
Ice dragon + alpine dragon
In Dragon Story, you can breed a Gemstone Dragon by combining a Diamond Dragon and a Gemstone Dragon. The Gemstone Dragon can also be bred using a combination of a Gemstone Dragon with another Gemstone Dragon. Make sure to check the breeding combinations in the game for any updates or changes!
you can't make metal dragons, you have to buy them
gummy dragon and coolfire dragon
wind dragon and legendary dragon
two legendary dragons
dandelion dragon and laser dragon