I had these for about 15 years. Been planning on building a small mountain scene out of them but haven't figured out how to cut them. Some of these can weight about 40 lbs. The first one weight at least 100.
Wet saw with a diamond blade. If you know what you're doing, you can rent one at Home Depot - though you will have to buy the blade and they aren't cheap. If you DON'T know what you're doing, find someone who does and offer them $$$ to cut your stone. I'll bet there are gemstone collectors or similar in your area who know someone who cuts geodes, etc.
Wet saw with a diamond blade. If you know what you're doing, you can rent one at Home Depot - though you will have to buy the blade and they aren't cheap. If you DON'T know what you're doing, find someone who does and offer them $$$ to cut your stone. I'll bet there are gemstone collectors or similar in your area who know someone who cuts geodes, etc.