"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.

Samples of Minerals That Are Found in Rocks

Demonstrates irregular breakage of minerals.

Specimens illustrate important stages of mineral formation.

Great value for the microscopic study of Feldspar minerals.

Five Types of Cohesiveness

Brazil.

A fascinating and colorful classroom mineral study set.