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conchoidal
This term is a specialized technical descriptor used primarily in geology, mineralogy, and archaeology. It describes a specific type of breakage where the resulting surface is smooth and curved, creating a series of concentric ripples. This is most famously associated with volcanic glass (obsidian) and quartz.
Because it is a highly specific scientific term, it is rarely used in casual conversation. In a non-technical context, one might describe such a surface as "shell-like" or "curved," but "conchoidal" is the precise requirement for academic or professional reports regarding material fractures.
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Ví dụ
Obsidian is well known for its distinct conchoidal fracture.
Look at the way this glass broke into conchoidal shards.
The prehistoric hunter used a conchoidal flake to create a sharp edge.
This specimen shows a classic conchoidal pattern on the break surface.
I wonder if this quartz fragment has a conchoidal surface.
The impact of the meteorite left behind several conchoidal fractures in the bedrock.
Check for a conchoidal break to confirm if the material is amorphous.
The edges of the flint tool are curved and conchoidal.
It has a smooth, conchoidal appearance similar to a seashell.
It has a smooth, conchoidal appearance similar to a seashell.