Glass and quartz crystals exhibit a smoothly curving,clamshell-shaped fracture pattern termed
A) glassy fracture.
B) conchoidal fracture.
C) one-directional cleavage.
D) obtuse fracture.

Question

Quizplus · Accepted Answer

The smoothly curving, clamshell-shaped fracture pattern exhibited by glass and quartz crystals is called conchoidal fracture. This type of fracture is characterized by smooth, curved surfaces with a dull luster and is often seen in highly brittle materials like glass, quartz, and obsidian. Other answers (A, C, and D) are not correct because they describe different types of fracture patterns that are not applicable to the given materials.

Glass and Quartz Crystals Exhibit a Smoothly Curving,clamshell-Shaped Fracture Pattern