Inorganic mulch, or what I call Superstar mulch, generally looks pretty. Rock and rubber mulch come to mind. They are best used in areas that you don’t intend to plant any more. There are a couple of schools of thought about recycled rubber mulch. Here’s some information for you to decide on your own from a source I’ve used called Dave’s Garden:
Is there anything good about Rubber Mulch?
If you intend on using rock, ask your vendor to take samples home so you can really get a good idea of what it’ll look like at YOUR house.
I’m not a fan of rock as it’s so heavy and hard to move but I know a lot of people really like it and when matched well with your home and your needs, it can be quite beautiful. I just like to move stuff so much that it’s a pain to me! 
Tags: inorganic mulch, rock, rubber mulch
