Do sprites created via 'Sprite.Create' get Cached?

I know Unity caches Resources loaded from Resources.Load() calls. Does Sprite.Create do a similar thing, or do I need to manually cache or batch sprites I've created using Sprite.Create. I am creating a tile system, and will be reusing the same sprites for tiles very often (100s to 1000s of copies). I want to know if they won't be cached, because in that case it would be much better for me to to cache 1 copy of each sprite, rather than a few hundred floating around.