O 10 Posts in this encyclopedia category
Obsidian Bedeutung Beschreibung
Obsidian Obsidian ist ein vulkanisches Gesteinsglas, das bereits seit der frühem Antike bekannt ist.
Obsidian Meaning Description
Obsidian Obsidian is a volcanic rock glass that has been known since early antiquity.
Onyx stone
Onyx means "fingernail" (Greek onyx=nail). In former times, agates were probably called onyx because their colour and shine remind of fingernails. It was not until the 18th century that the name...
Opal stone
The name opal comes from the ancient Indian "upala" = gemstone, and already bore its name in ancient Greece. Opals are found all over the world: Boulder opal, honey opal and blue opal in...
Orthoclase
In a broader sense, "orthoclase" refers to all feldspars splitting at right angles, in a narrower sense to monoclinic potassium feldspar. This has a variety of synonyms: felsite, orthose,...