Image: Photo by and (c)2015 Derek Ramsey (<a href="https://en.wikipedia.org/wiki/User:Ram-Man" class="extiw" title="en:User:Ram-Man">Ram-Man</a>) (CC BY-SA 4.0)
trigonalcommonSilicates
Amethyst
SiO2
A cluster of vibrant purple, translucent amethyst crystals, exhibiting characteristic hexagonal prism faces and pyramidal terminations.
Amethyst Physical Properties
Mohs Hardness
7Crystal System
trigonalLuster
vitreousStreak Color
whiteCleavage
noneFracture
conchoidalSpecific Gravity
2.65Colors
purple, violetTransparency
translucentType Locality
Brazil, Uruguay, Siberia (Russia), ZambiaMineral Group
SilicatesUses
jewelry, ornamental, collector's specimensAssociated Minerals
calcite, zeolites, agate, chalcedonyRarity
commonGeological Context
Amethyst forms in hydrothermal veins and cavities within igneous rocks, particularly basaltic lavas, where silica-rich fluids deposit quartz crystals. Its purple color is due to irradiation and iron impurities.
