What minerals break with jagged surfaces?
Chapter 3 Terms (Minerals)
| A | B |
|---|---|
| fracture | when minerals break with rough or jagged edges |
| gem | highly prized minerals because they are rare and beautiful |
| ore | a mineral that contains a useful substance that can be mined for a profit |
| titanium | a durable, lightweight metal derived from minerals such as ilmenite or rutile |
What is it called when a mineral breaks with uneven surfaces?
The uneven breakage of a mineral is called fracture. Some minerals break evenly and cleanly along a specific plane of the crystal.
When a mineral breaks in an uneven rough or jagged way?
Hackly – Fracture surface has sharp, jagged edges; Uneven – Fracture surface is rough and irregular; Fibrous – Fracture surface shows fibres or splinters.
What are the properties of breakage in minerals?
Fracture. When a mineral breaks irregularly, the breaks are called fractures. The breaks can be described as grainy, hackly (jagged), conchoidal (curved), or splintery.
What property is shown by a feldspar as it breaks into pieces with jagged edges?
Fibrous and splintery – similar to the way wood breaks. Hackly – jagged fractures with sharp edges….Density (Specific Gravity)
| Mineral | Composition | Specific Gravity |
|---|---|---|
| Feldspars | (K,Na)AlSi3O8 | 2.6 – 2.75 |
| Fluorite | CaF2 | 3.18 |
| Topaz | Al2SiO4(F,OH)2 | 3.53 |
| Corundum | Al2O3 | 4.02 |
What minerals usually break through cleavage and through fracture?
Mineral Cleavage and Fracture Test Video
| Mineral | Type of Breakage |
|---|---|
| Feldspar | |
| CLEAVAGE Cleavage in two directions at right angles. | |
| Quartz | |
| FRACTURE Mineral does not exhibit cleavage, it breaks or fracture in an irregular manner. |
What is property exhibited by MICA?
Because of their perfect cleavage, flexibility and elasticity, infusibility, low thermal and electrical conductivity, and high dielectric strength, muscovite and phlogopite have found widespread application.
What type of breakage does calcite have?
Mineral Cleavage and Fracture Test Video
| Mineral | Type of Breakage |
|---|---|
| CLEAVAGE Cleavage in three directions at right angles (90o). Cubic cleavage. | |
| Calcite | |
| CLEAVAGE Cleavage in three directions not at right angles (120o and 60o). Rhombohedral cleavage. | |
| Gypsum |
What property of mineral observed how the mineral breaks into thin sheets?
When geologists describe the cleavage of a min- eral, they consider both the directions in which the mineral breaks and the smoothness of the broken surfaces. Mica has cleavage in one direction and breaks into sheets.
Which of the following mineral shows phosphorescence?
Explanation: Phosphorescence is similar to fluorescence in essential character but in this case light is emitted by mineral not during the act of exposure but after the substance is transferred rapidly to a dark place. Fluorite, quartz, willemite and diamond show this phenomenon.
Is the property of a mineral that allows it to break smoothly along specific internal planes when the mineral is struck by a hammer?
Cleavage
Cleavage is the property of a mineral that allows it to break smoothly along specific internal planes (called cleavage planes) when the mineral is struck sharply with a hammer.