Is this a dry stack or are the joints grouted?
If dry stack was used, it is not practical as this is not appropriate for a wet zone area. Water can seep in and cause mould and mildew. Hopefully, it isn't as it is absolutely gorgeous. »
aussieinseattle I contacted the designer - Leonardo Shape 30x11 Satinato Side Mosaic modified for 3d look so it is a grouted tile - awesome way to get the stacked look while still using tile and avoiding the possible issues with stacked stone