Mineral
To see minerals in your dream signify a bright outlook. Things may look bleak or dark now, but things will look up.
Hairdresser
To dream that you are a hairdresser suggests that you are imposing your ideas and opinions on others. Perhaps you need to work on your self-image and improve on your image. Alternatively, it refers to your attitude toward your own sexuality.
Test
To dream that you are taking a test indicates that you are being put to the test or being scrutinized in some way. If you fail the test, then it suggests that you are feeling inadequate or insecure about some aspect of your waking life. If you ace the test, then it means that you are prepared and ready for the task at hand. There is also the notion that if you visualize success, then you will achieve success in your real life. Thus, this dream may be a “practice exercise” for you to visualize success. Alternatively, the dream may be a pun on “feeling testy” and irritated.
Arena
To see or dream that you are in an arena indicates that you need to be in an environment where you can freely express yourself. You need a stage or platform for your self-expression. Alternatively, the dream may indicate that there is some issue or problem that needs to be brought into the open.
Piano
To dream that you are playing a piano indicates a quest for harmony in your life. Consider where the piano is placed as a clue as to what aspect of your life needs accordance. If no sound is coming out of the piano, then it implies a lack of confidence. You are not sure about how to express yourself and how to voice your beliefs.