PBS
Nova Online: The Diamond Deception
A good overview of diamonds. Gives information on structure, properties, and origin. Includes models that can be rotated and examined in 3D. Also has activity for building your own carbon atom.
Children's Museum
Children's Museum of Indianapolis: What's a Hardness Scale?
Find an illustrated explanation of the Mohs' hardness scale, which is used to compare the hardness of minerals. The scale explains the differences in hardness among a range of minerals, beginning with the softest (talc) and ending with...
Amethyst Galleries
Native Elements Class: The Mineral Diamond
Description of diamonds and their properties. Includes a gallery of raw uncut diamonds.