Almost immediately after discovering an island off the coast of the Indigo Quarry, I discovered these slimes, at first I thought they were three different species, but after researching them, I discovered they changed colour depending on what they are fed.
Ruby Variant:
http://imgur.com/a/mNGGDEmerald Variant:
http://imgur.com/a/jjyenSapphire Variant:
http://imgur.com/a/UCyU3Appearance:
Either a red, green, or dark blue slime, covered in crystal spikes.
Location:
Indigo Quarry - Ash Isle
Diet:
Veggies
Slimeology:
Assumed to be a mutated version of crystal slimes, their bodies change colour depending on many factors, most likely the kinds of food they eat, Rubies enjoy Cuberries, Emeralds enjoy Minty Mango, and Sapphires enjoy Odd Onions.
Rancher Risks:
Their incredible appetite can easily clear out a garden, and their ever changing favourite food can lead to an abundance of plorts, which may lead to unwanted Tarr.
Plortonomics:
Once refined, can be used in neon signs, their colour changes depending on the amount of electricity passing through them.
Feel free to PM me with any slime requests, and I'll make you an image of them in the game.