Final answer:
Silicate minerals are the most common group of rock-forming minerals on Earth.
Explanation:
The most common group of rock-forming minerals is the silicates. Silicate minerals are composed of silicon and oxygen tetrahedra and form the largest group of minerals on Earth, making up the majority of the Earth's crust and mantle. Examples of common silicate minerals include quartz, feldspar, mica, and amphibole.
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