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

Quizplus · Accepted Answer

The smoothly curving, clamshell-shaped surface on the sample is a conchoidal fracture, which is a characteristic of minerals such as quartz. Facets are flat surfaces on a gemstone, cleavage planes are flat surfaces along which a mineral will tend to break, and striations are grooves or scratches on a mineral surface.

The Image Below Shows a Mineral Specimen of Quartz