The image below shows a mineral specimen of quartz.What is the term for the smoothly curving,clamshell-shaped surface on the sample?
A) conchoidal fracture
B) facet
C) cleavage plane
D) striation

Question

The image below shows a mineral specimen of quartz.What is the term for the smoothly curving,clamshell-shaped surface on the sample? 
A) conchoidal fracture 
B) facet 
C) cleavage plane 
D) striation

Quizplus · Accepted Answer

The smoothly curving, clamshell-shaped surface on the specimen is a characteristic feature of conchoidal fracture, which is a type of fracture that results in smooth, curved surfaces that resemble the inside of a seashell or a conch. Facet refers to a flat, polished surface on a gemstone or mineral. Cleavage plane refers to a plane of weakness along which a mineral may split, resulting in a flat, smooth surface. Striation refers to the parallel grooves or scratches on a mineral surface, typically caused by geological processes such as erosion or glacial movement.

The Image Below Shows a Mineral Specimen of Quartz