Variety of the mineral quartz often cut as a gem. Fancy Sapphires are gem corundums of any color other than red, blue or colorless. Serpentine - a group of metamorphic minerals used as gems and architectural stone. Most minerals on Earth are formed when magma rises from the depths of the planet to the surface and then cools. This family of minerals, called gems, groups together some 50 different semiprecious stones, including agate, opal, and jade, and four precious stones. Soothing and stress-relieving properties help you connect with the energy of the Earth by bringing harmony to your mind, body, and spirit. By anchoring you to the Earth, the Agate crystal stone meaning can help boost your sense of balance and equilibrium. It enhances mental function, improving concentration, perception and analytical abilities. It soothes and calms, healing inner anger or tension and creates a sense of security and safety.