Answer: fracture
Explanation:
Minerals are formed by crystallization from magmatic liquids or thermal solutions, by solid-state recrystallization and further, as the product of chemical reactions between solids and liquids. Fracture: When minerals do not break flat but according to an uneven surface. The types of fracture can be classified into:
• Conchoidal: when the mineral breaks, leaving curved marks similar to the growth lines of shells. Ex: quartz.
• Irregular: When the mineral breaks randomly, forming rough and uneven surfaces. Ex: tourmaline.
• Fibrous: when the mineral breaks down in the form of fibers. Ex: chrysotile.
• Serrated: when the mineral breaks up according to a jagged surface with sharp edges. Ex: gold.
