Opal does not have a cleavage or fracture because it lacks a distinct cleavage plane like minerals such as mica or calcite. Instead, opal typically fractures conchoidally, meaning it breaks with smooth, curved surfaces similar to glass.
the cleavage of gold is hackly. gold has niether fracture or cleaveage
Zinc is a metal that exhibits a fracture rather than cleavage. Fracture refers to the way a mineral breaks when it is not along cleavage planes, while cleavage refers to the tendency of a mineral to break along flat planes.
Cleavage is the tendency of a mineral to break along planes of weak atomic bonding, resulting in smooth, flat surfaces, while fracture is the tendency of a mineral to break with rough, irregular surfaces. Cleavage results in smooth, reflective surfaces that reflect light, whereas fracture surfaces are dull and do not reflect light. Cleavage is a property that is characteristic of certain minerals and can be used for mineral identification, while fracture can vary depending on the specific conditions of the break and is less consistent across different minerals.
Gold exhibits a fracture rather than cleavage. Fracture describes how a material breaks when no preferential planes are present, in contrast to cleavage which denotes how a material breaks along specific planes determined by its crystal structure. Gold's fracture is typically uneven and jagged.
The difference between a mineral that has cleavage and one that has fracture is that cleavage is the tendency of some minerals to brake along flat surfaces and fracture is the tendency of some minerals to brake unevenly along curved or irregular surfaces.
Opal is known for its cleavage, which is the tendency of the stone to break along certain planes due to its crystal structure. This can give opal a characteristic pattern of fractures or cleavage surfaces when it is damaged or cut.
Quartz does not have cleavage. However, it does have fracture. Its fracture is conchoidal.
The fracture of an opal can be hard or smooth , An opal can have as many fractures as any other mineral can . Sometimes opal can be smooth , sometimes they can be hard . The fracture of an opal is hard and smooth .
what is the fracture of a dark blue opal
it has no cleavage
it has no cleavage
cleavage
Fracture
Hematite has a characteristic fracture, meaning it breaks irregularly with rough or jagged edges and no smooth cleavage planes.
the cleavage is Poor
Sapphire has a mixture of both cleavage and fracture characteristics. It has poor cleavage in one direction and conchoidal fracture, which means it breaks with smooth, curved surfaces similar to glass.
It has both: uneven fracture, and perfect cleavage in three directions.