Long, well-shaped crystals come from two Mexican localities. Vera Cruz and Guerro. The Vera Cruz crystals are very pale, clear, prismatic crystals that are sometimes double terminated and have grown on a light colored host rock. These crystals sometimes have phantoms, having a clear quartz interior and an amethyst exterior. Guerrero has dark purple, prismatic crystals that radiate outward from a common attachment point. Often the crystals have phantoms opposite of Vera Cruz amethyst. The Guerrero crystals have a purple interior with a clear or white quartz exterior. Because long amethyst crystals are rare, these crystals can be quite valuable. These Specimens are from Mun. Las Vigas De Rairez Veracruz, Mexico.