If the Omnitrix scanned a Ruby gem, do you think it would make you a Diamond, or just the universe's best Ruby gem? On one hand, the Gems are implied to be a single species, with the individual Gem varieties functioning like races or dog breeds. On the other hand, these are crystal aliens. On the other hand, the Omnitrix scanned a Diamondhead and Upgrade without difficulty, and it has both races of Upchuck. And on the other hand... Insert Fourarms joke here!