Moon rocks are often called “cannabis caviar”. The two terms, although often interchangeable, originally referred to two different products. “Cannabis caviar” can refer to moon rocks or simply cannabis oil-coated nuggets. In other words, cannabis caviar must be covered with kief to be considered moon rocks. So if you are looking to buy moonstones at a dispensary and hear your partner talk about ‘caviar’ then it is always best to check and make sure you get some moonstones covered by kief. –Moonrock weeds are THC Cannabis buds dipped in or sprayed with hash oil, then rolled in kief. Though the potency of each batch of Moon Rocks varies and depends on how it’s made, the general consensus is that they hover around 54% THC.