Canna Cavi Moon Rock Weed Canna Cavi Moon Rocks is a premium flower (an uplifting Sativa, an Indica, or a hybrid, depending on which you prefer) soaked in a cannabis concentrate hash oil, flavored with terps, and usually rolled in kief. It’s caviar and/or moonrocks all in one. It’s also the name of a specific brand specializing in making these out-of-this-world products.