0
What else can I help you with?
A mineral is classified as an ore as long as what?
A mineral is generally classified as an ore, if its locallized concentration far exceeds its crustal abundance.
Must all rocks form crystals?
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.
What are the layers of obsidian?
Obsidian is a volcanic glass formed from rapidly cooled lava, and it typically lacks a layered structure like sedimentary rocks. However, variations in its composition and cooling conditions can create bands of color or inclusions, giving the appearance of layers. These bands may result from different mineral contents or gas bubbles trapped during the cooling process. The most notable types include black obsidian, snowflake obsidian, and rainbow obsidian, each showcasing unique visual characteristics.
What black greasy mineral might you get if molten lava cooled so rapidly that crystals did not have time to form?
If molten lava cools so rapidly that crystals do not have time to form, it can produce a black, greasy mineral known as obsidian. Obsidian is a natural glass that typically has a smooth, shiny appearance and is often formed from volcanic eruptions. Its rapid cooling prevents the crystallization process, resulting in its glassy texture.
Would gabbro or obsidian make a better arrowhead?
Obsidian
What are the minerals in obsidian?
Obsidian is, itself, a mineral.
What crystal group is obsidian in?
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.
Is obsidian chemichal or organic?
Obsidian is a natural volcanic glass, classified as a mineral rather than an organic substance. It forms when lava cools rapidly, preventing the crystallization of minerals. Therefore, obsidian is considered a chemical substance due to its inorganic composition.
What is a type of obsidian?
One type of obsidian is snowflake obsidian, which is black with white mineral inclusions that resemble snowflakes.
What is the origin Obsidian?
The origin is from medievil english. By the way, obsidian is a black mineral.
What are 3 examples of mineraloid?
Opal, amber, and obsidian are three examples of mineraloids. Mineraloids are naturally occurring materials that lack a crystalline structure but have physical and chemical properties that resemble minerals.
Is magnetite classified as a mineral or a rock?
Magnetite is classified as a mineral, not a rock.
Is magnetite classified as a rock or a mineral?
Magnetite is classified as a mineral, not a rock.
How much inches high is obsidian?
Obsidian is not identified, classified, or described by height. It is described by its texture, fracture, hardness, and chemical composition.
Why is the texture of obsidian is best contain few or no minerals grains?
Obsidian cools so quickly the mineral grains do not have time to form.
Is obsidian is harder than diamond?
No, diamond is the hardest known mineral.
Is obsidian a mineral?
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.
