Glue for dry rock

Rich

New member
I want to glue rock pictured below. I also don’t think I can use rod to support because is a deep shelf. Thx any help would be great 581FEB80-6A52-40F1-AC9F-4746700950DD.jpegon26BBB394-11B7-4C92-858D-5C56A5F7C625.jpegDDB1E1CC-883D-4D66-AA2B-D6F1C4CFCA94.jpeg
 
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