Presentation :
Names) :
Jasper (variety of chalcedony): Orbicular Jasper, Bloodstone Jasper, Leopard Jasper, etc.
Etymology:
From Greek and Latin iaspis.
Group, Family:
...
Presentation :
Names) :
Amethyst and Ametrine (variety of quartz).
Etymology:
Amethyst: From the Greek amethustos = which protects from drunkenness.
Ametrine: Contraction of ...
Presentation :
Shungite is a non-crystalline elemental carbon with a metastable structure incapable of graphitization. Contains traces of fullerenes (0.0001 <0.001%).
Names) :
...
Presentation :
Names) :
Rose quartz (variety of quartz).
Etymology :
Quartz: From German Quarz and color.
Group, Family:
Quartz family (Crystalline).
Color :...
Presentation :
Names) :
Labradorite*: "Oregon Sun stone / Labradorite sun stone", "Labradorite moonstone", "spectrolite".
Nb: note that the real moonstone is called "adular moonstone" a...
