Are there any gem/crystal mines on route from Detroit to Florida keys?

If you take a route from Southgate to Key West which passes through North and South Carolina you have three possibilities:
In NC:
Emerald Hollow Mine near Hiddenite Family Campground  https://www.emeraldhollowmine.com/
Cherokee Ruby & Sapphire Mine near Franklin (North Carolina)
http://cherokeerubymine.com
In SC:
Diamond Hill Mine near Abbeville (South Carolina)
https://diamondhillmine.com/
Check the websites to see opening times, activities and charges.
You may also find the map on the page I've linked below useful. It shows all US gem & mineral mines & locales. Click it to enlarge:
https://www.gia.edu/gem-map