Your eyes may appear to cross if you gaze too long in one place. In that case - relax and start again. How qucikly the images will appear depencds on how quickly you open you third eye. It is possible to see physical shapes in a crystal ball that has inclusions. For most people this takes time and practice.
Some people never master the skill.
When two people can gaze into the crystal ball at the same time. They usual see different things and get different messages. Your mind must be focused. Scrying Crystal ball reading is also linked to Scrying . Scrying is divination of distant or future events based on visions seen in a ball of rock crystal.