[Astrological Signs of Pisces, Virgo, Aquarius & Capricorn]
Amethyst is a variety of quartz that occurs [throughout the world] either in crystalline or massive form. The associated color ranges from deep purple to pale lavender. The presence of manganese in clear quartz produces amethyst, while additional amounts of iron content vary the purple coloration. The deepest amethyst colors occur in those crystals from Uruguay, Siberia, Africa, and Colorado. The most common occurrence is a medium purple color which is found in Brazil.