"geo-logic"

Examine the Mineral Composition of Igneous Rocks

Examine the Mineral Composition of Metamorphic Rocks.

Give Your Students a Lesson in Economics as Well as Geology

Activities to Examine the Appearance of Minerals

Geometric Shapes and Structures of Crystalline Minerals.

A variety of tensile strengths and physical traits represented.

Substantial Set of Economically Important Minerals

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.