Texas is not a state where marijuana or any kind of cannabis or THC oil is legal. Rosin is a cannabis extract that's extracted from Resin (hence the name).
There are many kinds of marijuana extracts that can be smoked_cannabis extracts with names like BHO, shatter, wax, crumble can be vaporized and inhaled.
The trichomes contain a lot of the plant's cannabinoids and terpenes, and because of that, kief has a powerful, heightened psychoactive effect on users.