University of Oxford (UK)
Oxford University Museum of Modern History: Mineral Mix and Match
A simple activity where you must choose the properties that describe both the mineral and an object made from it. The activity can be played with new sets of minerals, objects, and properties.
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.