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A mineral is generally classified as an ore, if its locallized concentration far exceeds its crustal abundance.
All rock does not contain mineral crystals. Obsidian, or volcanic glass, in particular is a rock that has cooled so quickly from lava that mineral crystals were not able to form.
Obsidian
obsidian
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
Obsidian is, itself, a mineral.
No one knows my namestake like I do (except Crystallography majors) and in reality obsidian is not quite classified as a type of crystal at all, as its composition is too complex to comprise a single mineral, it's usually just considered a mineraloid.
Mineraloids are a mineral like substance that don't exhibit crystallinity. 5 Examples: mercury pearl obsidian anthracite jet
The origin is from medievil english. By the way, obsidian is a black mineral.
Neither. It is a mineral mixture.
That is correct.
Obsidian because it's the only mineral that is the blackest of well......black! Anyway it's black I mean Obsidian (\_/) (o.o) (___)o
No. Obsidian is not crystalline so is not a mineral. It forms from the extremely rapid cooling of lava which means that crystals do not have time to form. This is described as a vitreous or glassy texture.
Obsidian is not identified, classified, or described by height. It is described by its texture, fracture, hardness, and chemical composition.
Obsidian cools so quickly the mineral grains do not have time to form.
Its a organic mineral.
Diamond is the hardest natural mineral known.