dyed marble

Dear Expert Panelists,
I'm looking to find any information I can regarding dyed marble (ie
what sort of dyes are typically used (vegetable etc); what is the
expected longevity of the dye and under what circumstances (ie indoor
vs. outdoor applications; public displays where the marble will be
touched by thousands of oily and perhaps grimy hands); what sort of
materials should be used when setting dyed marble, and anything else
you can think of relative to dyed marble. I'm having an incredibly hard
time locating any information.

Thank you,
Kristy Sonora.