Everyone should have at least one!
Amethyst - Purple to blue-purple quartz. It is believed to help clear the mind of negative thoughts. The most powerful and protective stone.
Malachite - Good fortune and prosperity/abundance. Great for deep energy cleaning.
Rose Quartz - Unconditional love that opens the heart chakra to all forms of love: self-love, family love, platonic love, and romantic love. The high energy of quartz gives rose quartz the property of enhancing love in virtually any situation.
Smoky Quartz - Enhances survival instincts, and can help one reach personal and business goals. It is said to help in elevating the mood and relieve from depression.
Carnelian - Brings out longevity of life and stimulates creativity.
Tiger Eye - Enhances good luck, and brings prosperity, often in the form of money.
Angel Aura - The meditation crystal. It is said to help with angelic communication and communicating with Higher Self and inner wisdom.
Red Jasper - Brings physical strength, energy, stamina, focus and determination. Great to have when working out.
Black Tourmaline - Absorbs electromagnetic radiation, which makes it excellent for placing near computers and other electronics. Highly grounding and stablizing. Great for those always in front of screens.
Black Onyx - Protection stone. Aborbs negative energy and helps in preventing the drain of personal energy. It is said to help in relieving stress.