* Conchoidal fracture: This is a smooth, curved, shell-like fracture, often seen in quartz and obsidian.
* Hackly fracture: This is a jagged, irregular fracture with sharp edges, often seen in native metals like copper and silver.
* Splintery fracture: This type of fracture produces long, thin, splintery fragments, often found in asbestos and wood.
* Uneven fracture: This is the most common type of fracture, resulting in a rough, irregular surface.
So, the answer to your question is: minerals that exhibit uneven fracture. Examples include:
* Feldspar: A common mineral that can exhibit uneven fracture.
* Quartz: While it often shows conchoidal fracture, it can also have uneven fracture.
* Pyrite: A mineral that can break with a hackly or uneven fracture.
Remember, the specific type of fracture can vary even within the same mineral depending on its crystal structure and other factors.
