Growing Dendrobium/Thylchiton kingianum on rock slab

[DelawareJim]

Do any of our Aussie friends know what types of rock Dendrobium/Thylchiton kingianum grows on in the wild? Granite, limestone, gneiss?

Looking at geological maps of eastern coastal OZ, it appears it's mostly granite in kingianum's range.

I'd like to try growing a piece of mine on a rock slab and allowing some leaf litter and such to accumulate in the canes trying to reproduce a small piece of their natural habitat for a display.

Not this big, but something like his:


Any help would be greatly appreciated.

Cheers.
Jim