What is a thin section in geology?


What is a thin section in geology?

Optical Properties of Minerals:

Many minerals have optical properties. Any transparent or translucent material, including minerals, will refract light. The degree to which it refracts light is an optical property. Larger, clear, well-formed calcite crystals are often used to demonstrate an optical property called double-refraction. Such a crystal will often be placed over text. When a person tries to look at the text through the crystal, they will see two images of the word. This happens because the mineral refracts light differently depending on the direction light passes through it.

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Rocks are frequently too fine-grained for a geologist to be able to identify minerals in a hand sample. Studying these rocks under a...

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Optical Properties of Minerals: Luster, Light Transmission, Color & Streak


Chapter 6 / Lesson 1

Minerals are conveniently identified based on their physical properties. These properties include luster, ability to transmit light, color and streak. This lesson will describe each of these properties and examples of each.

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