Three Classes of Rock Crossword

This printable crossword puzzle on the topic of Rocks & Minerals has 15 clues. Answers range from 4 to 11 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Native elements, halides, and sulfates
Hot fluid in between earths crust
The way a mineral reflects light
The color of a mineral in powdered form
Magma pushes into surrounding rock between earths surface
Building block of matter
Mass per unit volume
Formed in layers of sand and mud
Formed by molten magma that cools on earths surface
Formed when rocks are too close to magma and get heated up
Formed when lava cools quickly
When lava erupts on earths surface
Anything that has mass and volume
A substance made up of molecules of two or more elements
Changed by heat and pressure ; grains will not align