How is plaster of paris used in mixed media?

I want to glue down a few slightly heavy objects for a mixed media piece. I am looking for the right thing to use for mosaics and also big objects that are not broken like a stone ware jug. I know how to use tile caulking but am interesting in something more stable to put around the objects and add texture . I have not seen anything much about making art with plaster of paris on the web.
 
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