Obsidian. It commonly is dark because of the Fe contamination.
To determine if a mineral has cleavage or fracture, observe how it breaks. Cleavage is characterized by smooth, planar surfaces along specific directions where the mineral splits easily, reflecting its internal atomic structure. In contrast, fracture results in irregular, jagged surfaces without defined planes. Testing a mineral's breakage pattern can help you identify its cleavage or fracture nature.
Obsidian because it's the only mineral that is the blackest of well......black! Anyway it's black I mean Obsidian (\_/) (o.o) (___)o
Quartz is a mineral that cannot split easily along a certain direction because it lacks cleavage. Instead, quartz breaks in a conchoidal fracture, producing curved, shell-like surfaces.
The fracture of mica refers to the way in which mica breaks or cleaves when it is subjected to stress. Mica has a perfect basal cleavage, meaning it breaks easily along flat planes parallel to its mineral structure. This results in thin sheets or flakes of mica with a characteristic luster.
For the uraninite: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments; data from http://webmineral.com/data/Uraninite.shtml. Any mineral of uranium has its specific properties - and we know now approx. 200 uranium minerals.
Sulfur has a conchoidal fracture, resembling the curved shape of a seashell when broken. It does not have a distinct cleavage because its atomic structure does not easily allow the mineral to break along specific planes.
Yes, muscovite, a common mica mineral, exhibits perfect cleavage rather than fracture. This means it can easily be split into thin, flexible sheets along specific planes. While it may break in a way that appears to be a fracture, its tendency is to cleave smoothly along its crystal structure.
Fracture means a type of break. Not the same as a broken bone. A broken bone is when the bone snaps and the two peices of bone come apart. A fracture is when the bone breaks but does not come apart/disconnect.
It wil break & produce fragments of d same shape as d parent material bcos it broke on a flat surface
Very Easily.
The main term for a fracture of the clavicle is a broken collarbone. It is one of the most common bones in the human body that get broken easily.
i think it means fractures easily