Citrine Crystals are well known as potent healing crystals for you to use to aid you to manifest abundance and prosperity, but  also have other properties, including to relieve fear and anxiety.
All of the various colors and types of this golden stone are well known to help you to think more clearly as well as bringing happiness, joy and other positive things and situations into your life!
They are a variety of quartz that are closely related to Amethyst and many of the stones on the market are created from Amethyst Crystals by heat treatment but not all.
Many beautiful natural pieces come from the Rio Grand do Sul region of Brazil, as well as in other areas including in France, Britain, Russia, Madagascar, Burma, Spain, South Africa and in the USA.