keep looking , it's there. The rest of us have found it.

Try the north, northwest at the top of the hot island,mine was buried I used a steam roller and found it that way,hope this helps:)

There are 2 large ruby deposits on the bottom left island, both of which are inside caves.

Co-ordinates to the entrance of the caves are: (Press F3 in game to see your co-ordinates). -1083, xxx, 585
-1147, xxx, 1068

i found them, but they are hard to find. i was looking not that high , or at the top, but not in the middel of the mountain

You have to understand the concept of the game, the breeds you are looking for do not appear immediately. You need to terraform and explore regions, raise or lower temperatures. Then the breeds you are looking for will appear!

The ruby source deposit wont show up on the map until you complete a certain objective.