Chrysocolla is a copper silicate hydroxide commonly associated with malachite and azurite. A decomposition product of copper minerals, chrysocolla is frequently intergrown with other minerals such as quartz, chalcedony or opal, yielding a harder, more resilient gemstone. Crystals are rare and more common are fine-grained aggregates and massive deposits. As a reliever of fear and stress-related anger, chrysocolla helps one serenely accept changing situations. Sources include Peru, Chile, England, Central Africa, Israel, New Mexico, Arizona and Utah.