This image reflects more that one perspective, the obvious one would possibly be look to the cups / mugs / tumblers at the base of the surround, some could say its a combination of materials. Yes would be the answer to those queries, although it sometimes pays to look closer. Not to find faults which undoubtedly there will be but to find what works and what does not. Not to mention the surround that clearly has two parts. This fireplace combines many disparate salvaged parts from different locations and jobs from different professions…. I will have a drink to that, what will it be?