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Dylan's Rocks and Minerals Crossword

Across
Solid material formed by nature in/on Earth's crust.
Can change if it contains impurities.
Pressed and cemented layers of rock, shells, and plant or animal remains.
Color of the mark made when scraped on tile.
Thinnest and outer layer made of solid rocks.
Down
Rock formed from cooled magma or lava.
Break along a smooth flat surface.
Has straight edges and flat sides.
How a mineral's surface reflects light.
Formed when existing rocks that have been squeezed and heated deep inside Earth's crust.