"geo-logic"

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GEO-logic Hardness Set

A Complete Kit to Communicate the Concept of Hardness in Minerals

Examples of Different Forms of Breakage in Minerals

Geometric Shapes and Structures of Crystalline Minerals.

Samples of Minerals That Are Found in Rocks

Give Your Students a Lesson in Economics as Well as Geology

Activities to Examine the Appearance of 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.

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