posted by Unknown .
Fill in the blanks
1. Minerals are classified in many ways, including hardness, streak, and ______ properties.
2. There are some minerals that are valued as _______ because of their hardness, color, and beauty.
3. Non-silicates make up less than 10% of Earth's _______; the most common non-silicates are the carbonates, oxides, and sulfides.
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