If you don't need more than a 12" x 12" footprint, there's another much cheaper way. Head to your local Lowe's/Home Despot and pick up 6 flor tiles in your stone of choice: marble, black granite, etc. Epoxy three together to get desired thickness of plinth, with the added bonus of "constrained layer" technology. Heck, you could even mix and match granite and marble for the "zebrastone" look. Under $40 per side, including glue and tax.
There have to be bigger tiles out there too--e.g. 16" x 16"--but they're not sitting on the shelf at my local Lowe's. FWIW.
There have to be bigger tiles out there too--e.g. 16" x 16"--but they're not sitting on the shelf at my local Lowe's. FWIW.