7th-8th Ch. 14 Review 2

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This is the bending of light.

This mineral has a hardness of 1.

This is the hardest natural mineral.

Obsidian, a mineral of volcanic origin, breaks in smooth, curved surfaces. What type of fracture does it show?

Which of the following minerals has perfect cleavage?

A black mineral sample attracts iron filing. You could conclude that the mineral is ______.

The best metallic conductor of electricity is _____.

This is the only precious metal that readily tarnishes.