Presentation :
Names) :
Amethyst (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects against drunkenness.
Group, Family:
Quartz (Cryst...
Presentation :
Names) :
Amethyst (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects against drunkenness.
Group, Family:
Quartz (Crys...
Presentation :
Names) :
Amethyst and Ametrine (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects from drunkenness.
Ametrine: Contraction of A...
Presentation :
Names) :
Amethyst (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects against drunkenness.
Group, Family:
Quartz (Cryst...
Presentation :
Names) :
Amethyst (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects against drunkenness.
Group, Family:
Quartz (Crys...
Presentation :
Names) :
Anhydrite* angelite variety.
Etymology:
From the Greek anhudros = without water, unlike gypsum which contains water (Werner, 1803).
Color :
Lig...
