Chemistry
Elements
- Chemical Elements
- Chemicool Periodic Table
- Periodic Table
- Periodic Table of Elements
- Periodic Table of the Elements
- Pictorial Periodic Table
- The Chemical Elements
- Visual Elements
- WebElements Periodic Table
Minerals
- Common Minerals
- State Mineral Production Summaries
- Gemstone Index
- Minerals by Name
- Gem by Gem
- Minerals A-Z
- Mineral Miners
Amber
Amethyst
Asbestos
Aspirin
Baking Soda
Butane
Cinnamon
Coins
- Coin Specifications
- About the Mint
- Metal Used in Coins
- United States Department of the Treasury
- Coin Facts
- 1946 - Roosevelt Dime
- A World Time Line of Nickel in Coins
- Americans for Common Cents