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.
Confusion between hemp oil and marijuana oil has spiked recently, as states have passed medical marijuana laws that allow for the use of strains of marijuana that are low in THC and high in CBD. Consumers often confuse hemp oil with CBD oil because both are low in THC and contain CBD.