While I didn’t hate the old, dark version (above right), it was dated and a little more rustic than I was looking for. The rocks weren’t real, they were painted Disneyland-style fakes.
The new look (above left) is made up of textured limestone tile, laid in a brick pattern with no grout so it looks like stacked blocks of stone. I must have looked at hundreds of options before deciding to go for this modern, light look with no mantlepiece. The hearth is the same shape as before but is less imposing, now that it has the same matte gray tiles as the floor below it.