Amethyst Galleries
Amethyst Galleries: Physical Characteristics of Minerals
The properties of minerals are defined in this resource, such as color, luster, cleavage, hardness, streak, and more. Included are pictures of minerals along with detailed descriptions. You can also search for minerals by name, class, or...
Amethyst Galleries
Amethyst Galleries: Mineral Gallery: What Is Crystal Cleavage?
After explaining the difference between cleavage and fracture, this resource discusses various types of cleavage and their importance in identifying minerals.
Amethyst Galleries
Amethyst Galleries: Mineral Gallery: What Is Streak?
Streak is the color of the powder of a mineral. This page discusses the importance of streak when identifying minerals.