Mineral Identification Exam 1 Prep

False (B)

conchoidal

<p>Cleavage refers to a mineral's tendency to break along specific planes due to its weaker bonds, resulting in smooth, flat surfaces. Fracture, on the other hand, describes uneven or irregular breaking, with no consistent pattern.</p> Signup and view all the answers

<p>Cleavage = The way a mineral breaks along specific planes due to its weaker bonds Fracture = The way a mineral breaks irregularly or unevenly Conchoidal fracture = A curved, shell-like fracture found in minerals like quartz</p> Signup and view all the answers

<p>Halite (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Pinacoidal</p> Signup and view all the answers

<p>Calcite</p> Signup and view all the answers

<p>Dipyramidal = Two pyramids joined at their bases Cubic = Six equal square faces Bladed = Flat and thin, like a blade Tabular = Flat and plate-like Druzy = Covered with small crystals Acicular = Needle-like Dendritic = Branching, tree-like Radial = Crystals radiating out from a central point Fibrous = Long, thin fibers Prismatic = Elongated, prism-shaped Botryoidal = Round, grape-like clusters Stalactitic = Icicle-like Oolitic = Small, round grains Pisolitic = Larger, rounded grains Foliated = Sheet-like layers</p> Signup and view all the answers

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Ordered breakage of a mineral along specific planes due to weaker bonds.

Unordered breaking of a mineral without any specific pattern or direction.

Calcite exhibits 3 planes of cleavage, not at 90 degrees, when broken.

Quartz fractures conchoidally, meaning it creates smooth, curved surfaces.

Cleavage is orderly and structured; fracture is random and chaotic in breaking.

Different patterns of how minerals break; includes basal, prismatic, cubic, and more.

A single direction of cleavage, example is Muscovite.

Three directions of cleavage at 90 degrees, example is Halite.

Two directions of cleavage not at 90 degrees, example is Hornblende.

Three directions of cleavage not at 90 degrees, example is Calcite.

Layered appearance of minerals, like in schist or slate.

Minerals that appear in thin, thread-like structures.

Minerals that form in rounded, grape-like clusters.

Minerals that show a coating of tiny crystals on a surface.

Optical effect seen in some feldspars, displaying colorful flashes.