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Why isn't a mineral's color a reliable way to determine it's identity?




This question is part of Minerals Quiz
Asked by Renaan, Last updated: Jan 19, 2020

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3 Answers

T. ADAMS

Here to relax my mind a bit

T. ADAMS, Senior Executive, MBA, Andalusia

Answered Jun 20, 2019

The correct answer to this question is that minerals often have different colors. While a metal like gold will always look like its namesake and be shiny, there are minerals like Calcite and Quartz that come in different colors. There are many elements which can affect a mineral's color. These elements can include radiation, light, and heat. An example is the mineral Proustite, which turns dark when it around the light. Another aspect that can affect the color is tarnishing. Many elem...Read More
 

Michael

Michael

Answered Mar 28, 2018

Minerals differ in colors although most of them have a specific color range. However, some minerals have alternate color when they are grounded to powder than their natural attribute. This is the more reason why Geologists and other mineral researchers make use of tiles of unglazed porcelain usually referred to as a ‘Streak plate’ to discriminate minerals by their streaks. In another hand, they may have to scratch the mineral over a surface to get the real color as some am...Read More
 

John Adney

John Adney

Answered Jul 11, 2017

Minerals often have different colors. Streak color mostly differs from appearance color

 

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