This specimen has the ideal, natural faceted shape and is instantly recognizable as an amethyst. The Phantom aspect of it can be clearly seen at the peak of this piece and causes a unique variation of light, transparent purple to a cloudy, dark purple phantom.
Amethyst is a purple variety of the Quartz family of crystals. It is a semiprecious stone, and the birthstone for February. It sits at a 7 on the Mohs Scale of Hardness, and is likely the single most recognized gemstone on the planet. Phantom Amethyst shows an image embedded in the crystal that gives the impression of a crystal within a crystal.
Phantom Amethyst specifically is used extensively in Crystal Grid layouts. Amethyst is a widely used stone, in some cases referred to as an "all-purpose" stone because of how often it is utilized. It is believed to enhance spiritual intuition and possess a high spiritual vibration making it a fantastic meditation aid.