To identify the mineral with conchoidal fracture and vitreous luster from the given options, we can analyze each mineral's characteristics.

1. **Plagioclase**: Typically shows a more obvious cleavage than conchoidal fracture and generally has a pearly to dull luster.

2. **Orthoclase**: Also exhibits good cleavage and usually has a pearly luster rather than vitreous.

3. **Biotite**: Recognized for its perfect cleavage, not conchoidal fracture, and has a glassy to pearly luster.

4. **Quartz**: Known for its conchoidal fracture and glassy (vitreous) luster. This mineral does not have cleavage like the others.

5. **Amphibole**: Exhibits prismatic cleavage and has a vitreous to dull luster, not conchoidal.

### Final Answer
The mineral that is generally identified by its conchoidal fracture and vitreous luster is **Quartz**.

Question

To identify the mineral with conchoidal fracture and vitreous luster from the given options, we can analyze each mineral's characteristics.

1. **Plagioclase**: Typically shows a more obvious cleavage than conchoidal fracture and generally has a pearly to dull luster.

2. **Orthoclase**: Also exhibits good cleavage and usually has a pearly luster rather than vitreous.

3. **Biotite**: Recognized for its perfect cleavage, not conchoidal fracture, and has a glassy to pearly luster.

4. **Quartz**: Known for its conchoidal fracture and glassy (vitreous) luster. This mineral does not have cleavage like the others.

5. **Amphibole**: Exhibits prismatic cleavage and has a vitreous to dull luster, not conchoidal.

### Final Answer
The mineral that is generally identified by its conchoidal fracture and vitreous luster is **Quartz**.

Knowee AI · Accepted Answer

To identify the mineral with conchoidal fracture and vitreous luster from the given options, we can analyze each mineral's characteristics.

1. **Plagioclase**: Typically shows a more obvious cleavage than conchoidal fracture and generally has a pearly to dull luster.

2. **Orthoclase**: Also exhibits good cleavage and usually has a pearly luster rather than vitreous.

3. **Biotite**: Recognized for its perfect cleavage, not conchoidal fracture, and has a glassy to pearly luster.

4. **Quartz**: Known for its conchoidal fracture and glassy (vitreous) luster. This mineral does not have cleavage like the others.

5. **Amphibole**: Exhibits prismatic cleavage and has a vitreous to dull luster, not conchoidal.

### Final Answer
The mineral that is generally identified by its conchoidal fracture and vitreous luster is **Quartz**.

Which mineral is generally identified by its conchoidal fracture and vitreous lustre?Group of answer choicesPlagioclaseOrthoclaseBiotiteQuartzAmphibole