a scorch dragon is made by breeding the lightning and fire dragons.
Another dragon
Breeding a flower and scorch dragon will result in 5 possible dragons which are, poison dragon, cactus dragon, flower dragon, firefly dragon, and scorch dragon.
You get the scorch dragon
When you breed an earth and firefly dragon, you can get a crystal, scorch, sandstorm, or firefly dragon.
The most effective method of breeding a summer dragon is using a water dragon and scorch dragon. This has a 16% success rate. The egg is yellow with a blue caterpillar design, and takes 24 hours to hatch.
The result of breeding an blazing dragon and crystal dragon has 9 possible dragons you may breed which is the firefly dragon, scorch dragon, quake dragon, blazing dragon, sonic dragon, lava dragon, solstice dragon, crystal dragon, and rainbow dragon.
There is no such thing as a Birthstone Dragon on DragonVale
it could be anything?
A yellow egg with silver diamonds produces a crystal dragon.
You can get any of the following dragons, Scorch, Firefly, Quake, Obsidian, Lava, and Crystal.
As of July 2012, there has not been a star dragon in DragonVale.
You could get a firefly scorch or a metal