Other
Reade International Corp.: Specific Gravity Table for Metals, Minerals, Ceramics
This is a table listing the specific gravities of various metals, ceramics, and minerals. Very complete listing and a good resource.
Curated OER
Amethyst Galleries,inc./specific Gravity of Minerals
The specific gravity of various minerals is given. Links to related topics.
Wikimedia
Wikipedia: Hornblende
Wikipedia offers a description of the mineral Hornblende including specific gravity, hardness, and image.
Math Science Nucleus
I. Science Ma Te: Integrating Science, Math and Technology
This site offers a wealth of online textbook-related materials that encourage the discovery of science in the world around us. Enter the site to access material on specific topics. Each section contains reading material (complete with...