Talk:Jade Dragon/@comment-4856245-20130518180800

Leaving out the metal elements and going by past gem dragon breedings, the dragons that have not been used yet for the gem dragons are: Thunder, Pollen, Ice, Coral, Blizzard, Blazing, Salamander & Willow. So far BFS has only used the Crystal & Cactus dragon more than one time for the gem dragons combinations (Emerald, Peridot & Topaz).

April and July gem dragons used hybrids containing the metal elements,  (Diamond = Ice &  Mine, Ruby =  Chrome  & Scorch),  so I really don't think we can rule out the metal elements at this point.