Purple Opal:
Presentation :
Opal is formed when water leaches silica and it is deposited on layers of sandy clay during a period of drought. The term opal therefore designates a family of ...
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 and Ametrine (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects from drunkenness.
Ametrine: Contraction of A...
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 and Ametrine (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects from drunkenness.
Ametrine: Contraction of A...
Presentation :
Names) :
Amethyst and Ametrine (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects from drunkenness.
Ametrine: Contraction of ...
