I would be surprised if it's not real stone.
We are going to see more of this, as in panels with real stone or brick veneers anchored into concrete. I am not certain if this particular method was used on the Florian, could be, but it's being used at Lago at the Waterfront and Riva del Lago now, and I believe it's going to be used at The Selby. Essentially, either real cut stone or real kiln-fired "thin" brick is laid down into customized panel templates, and then a poured reinforced concrete backing is created. The end result is a highly weather-resistant, low-maintenance, long-lasting, well-insulated piece of building envelop which can be lifted into place, and which—other than where there are seams between the panels—appears to be real brick and real stone, because the facing is real brick and real stone.
No, it's not erected by traditional methods, but the fabricators are saying it will last longer than traditionally made products, and it's easier to install as you don't have to build tall scaffolds or hang stages around buildings.
There's more than one way to build the panels, but check out
this YouTube vid as an example of one method.
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