My first instinct was tile exactly because of how labor intensive this would be but then I began looking at all the color variations. I would think tiles would have more consistent coloring so this could definitely be timber. It seems too "imperfect" to be man-made material. As someone else said, "tricky."

Hi Sarah, You can go for alternative stone cladding from Boral called Cultured Stone. They are great products and can be installed by most stone masons on brick or rendered walls. If you're in WA, you can find out more by calling us on 13 15 40 or visiting http://www.midlandbrick.com.au/cultured-stone.asp However, if you're in the East Coast, you can check out Which product is available in the state you live in: http://www.boral.com.au/productcatalogue/CategoryDirect_CTR.aspx?country=AUS&category=81 Below are examples of Cultured Stone cladding that's most similar to the photos you have attached: Boral Coral Stone - Fossil Reef Boral Cobblefield - Texas Cream Boral Country Ledgestone - White Oak Hope we at Midland Brick have been able to help you out Thanks!

Looking at the attached photo you can see compared to close to the wall the floor tiles are streaked with white stains. I have tried using vinegar and scrubbing brush and also other cleaning products....

Though I don't know for certain, I think the cotton/linen shades are removable. I wasn't able to determine this by my searches. This could easily be confirmed by making an enquiry to supplier before purchase. Alternatively, a handmade one could be made removable by making shade slightly larger than frame and making ties.