When limestone gets even more squashed, it can turn into travertine or marble. Limestone is also the main way you get lime, which is one of the things you make cement out of. To get lime, you have to burn limestone in lime kilns, and then what is left is lime. In the Middle Ages, people burned most of the statues of ancient Greece and Rome to turn them into lime.
Far as I am aware, CBD oil is not legal in Texas. It is legal for medical use in only Utah, Alabama, Kentucky, Wisconsin, Mississippi, Tennessee, North and South Carolina, Iowa, Florida, Georgia, New York, and Missouri.
Hemp oil is legal if you can find it. Been so long I can not remember what it was used for. Like coal tar. A thing of the past. Cannibals would be a different oil as it would contain thc. That would be illegal. You would need to go back to the Korean war when we raised hemp for rope at home for the war effort and there was a plant to make that and rope at home. Long gone today.