Teresa Widener, or possibly Ms. Widener if you want to be formal. But wait, there's even
a video of her - not for the faint of heart.
And
Liaquit Khan can't quite snacking on rocks. Ironically, he was able to quit tobacco. The face of his friend in the background is priceless.
One a marginally more serious note: if you break down the term
geophagist into its Greek roots of
geo (earth) and
phago (eat, devour) plus suffix
-ist (person who performs the prior roots), I guess we could take the root
litho (stone) and call them
lithophagists.
I'd think that sand might fall under the general guise of 'earth', but if you're in a neologismisticly pedantic mood, use the Greek root for sand,
psamm or
psamath, and call them
psammophagist or
psamathophagists.
Of course I just coined those terms - I don't think you'll actually find them anywhere. In fact, I made up 2.5 percent of the words in this post.