few more pics
sure does look like the water and soaps have eaten into this stone
it was sealed with sealers choice if i remember
its worse around the bottom. shower pan tile is a dal tile and not really affected.
its a mud pan on a rubber liner
kerb is wood framed wrapped over liner
upper floor on timber framed house with radiant heat floors // 2" pour lwt concrete
don't think any where in the shower pan area
densheild with redguard on top
as if you look at the curb threshold it still half shinny as installed/outside of the shower cubicle but where the water has hit it looks and feels course and pitted