Why does obsidian rock contain no crystals? - Answers
Jun 16, 2024 · Since obsidian has no crystals, it therefore has no grain size. Obsidian is a type of volcanic glass that lacks a crystalline structure, so it does not contain mineral grains.
What is the difference between obsidian and pumice? - Answers
Jun 14, 2024 · Obsidian, on the other hand, is a naturally occurring volcanic glass and is considered a mineraloid rather than a true mineral because it lacks a crystalline structure.
Can you melt obsidian to create glass objects? - Answers
Feb 7, 2025 · Yes, obsidian can be melted to create glass objects. Obsidian is a natural volcanic glass that can be heated to high temperatures to become molten and then shaped into various …
What is obsidian's cleavage? - Answers
May 26, 2024 · Obsidian does not have cleavage because of the way it forms. Obsidian is essentially nature's form of glass and so it has no regular or patterned crystal structure. …
What are very smooth rocks called? - Answers
Jun 13, 2024 · obsidian obsidianWhy do the rocks located in stream beds are smooth? Rocks in stream beds can become smooth due to a process called abrasion. As water flows over the …
What is the weight of obsidian? - Answers
May 31, 2024 · Obsidian is considered to be relatively heavy due to its density compared to other types of rock. Its weight is attributed to its composition, which includes various minerals and …
Does obsidian a glassy rock have a large grain size or a ... - Answers
Jun 12, 2024 · Obsidian has a small grain size due to its volcanic origin, which means that it cools quickly and does not have time to form large crystals. It is typically fine-grained and exhibits a …
What is the difference between obsidian and coal? - Answers
May 24, 2024 · Obsidian is a natural volcanic glass that is typically black and glassy in appearance, whereas coal is a sedimentary rock that is typically black and dull in appearance.
Did the obsidian rock go through weathering or erosion?
Jun 5, 2024 · Obsidian goes through the rock cycle the same way other rocks go through the rock cycle, either through metamorphosis, weathering and erosion and subsequent lithification into …
What is volcanic glass? - Answers
Jun 10, 2024 · Obsidian is a glass of volcanic origin. Siliceous volcanic glass is also known as obsidian. The atoms in volcanic glass are highly disorganized. Volcanic glass is not a mineral.