Geology 101: Mineral Identification Quiz

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| Attempts: 11 | Questions: 8 | Updated: Nov 4, 2025
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1. What mineral is this?

Explanation

Quartz is known for its hardness, conchoidal fracture, and various varieties like crystal, smokey, and rose. Topaz, Calcite, and Feldspar possess different characteristics such as differing hardness levels, cleavage properties, and distinct varieties, making them incorrect answers in this context.

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About This Quiz
Geology 101: Mineral Identification Quiz - Quiz

This review focuses on mineral identification and properties, essential for students in Geology 101. It tests understanding of mineral composition and classification, enhancing practical geology skills and preparing learners for advanced geological studies.

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2. What mineral is this?

Explanation

The correct answer, Galena, is known for its cubic cleavage and being very heavy. The incorrect answers provided describe different minerals with distinct characteristics and properties that differentiate them from Galena.

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3. What mineral is often referred to as 'Fool's Gold' and has a black streak and cubic crystal form?

Explanation

Pyrite is commonly known as 'Fool's Gold' due to its metallic luster and pale brass-yellow hue. It has a black streak when scratched across a surface and typically forms cubic crystals.

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4. What mineral is this?

Explanation

Muscovite is characterized by its flakey/platey structure and softness, making it easy to scratch with a fingernail.

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5. What mineral is this?

Explanation

The correct answer is Biotite 'Micah' which is flakey/platey and very soft, being scratchable with a fingernail. Quartz is hard and can scratch glass, Calcite fizzes when exposed to acid, and Feldspar forms in a cubic shape.

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6. What mineral is described by the following characteristics: Na-Plagioclase, 2 cleavages at almost 90 degrees, lighter color, and striations on cleavage faces?

Explanation

The characteristics mentioned point towards Na-Plagioclase, specifically the cleavages at almost 90 degrees and the striations on cleavage faces.

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7. What mineral is this?

Explanation

The correct answer describes the characteristics of Ca-Plagioclase, including its cleavages at almost 90 degrees, darker color, and striations on cleavage faces. The three incorrect answers provide details about Quartz, Calcite, and Pyrite, which have distinct properties that differentiate them from Ca-Plagioclase.

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8. What mineral is this?

Explanation

The correct mineral is Magnetite as it exhibits magnetic properties and leaves a black streak when scratched against a surface.

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What mineral is this?
What mineral is this?
What mineral is often referred to as 'Fool's Gold' and has...
What mineral is this?
What mineral is this?
What mineral is described by the following characteristics:...
What mineral is this?
What mineral is this?
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