"bouteille de gaz"

Geometric Shapes and Structures of Crystalline Minerals.

Give Your Students a Lesson in Economics as Well as Geology

Explore the differences of how light interacts with the surface of a mineral.

Specimens Illustrate Smooth Mineral Breakage

Clear examples of a key method of identification.

Himalayan mineral great for teaching and display.

Introduce your students to a broad selection of minerals.

Samples of Minerals That Are Found in Rocks

Demonstrates irregular breakage of minerals.

A fascinating and colorful classroom mineral study set.