Other
The image.com: Minerals
This is a very large list of minerals complete with image and physical descriptions, chemical descriptions, and classification.
Amethyst Galleries
Amethyst Galleries: Mineral Gallery: The Color of Minerals
This resource provides information about the color of minerals.
Curated OER
The image.com: Minerals
This is a very large list of minerals complete with image and physical descriptions, chemical descriptions, and classification.