Question

Gemstones like diamonds and emeralds are typically associated with which type of rock?

• A. Sedimentary Rocks
• B. Igneous Rocks
• C. Metamorphic Rocks
• D. Weathered Rocks

Answer 1

Answer:

C. Metamorphic Rocks

Metamorphic Rocks and Gemstones

Formation of Metamorphic Rocks

• Metamorphic rocks are formed when existing rocks (igneous, sedimentary, or even other metamorphic rocks) are transformed by heat, pressure, or chemical reactions.

• This transformation occurs deep within the Earth's crust or mantle.

• The intense conditions cause the minerals within the original rock to recrystallize, rearrange, or form new minerals.

Gemstones Found in Metamorphic Rocks

• Many valuable gemstones, including diamonds and emeralds, are primarily found in metamorphic rocks.

• Diamonds: Formed under extremely high pressure and temperature deep within the Earth's mantle, diamonds are brought to the surface through volcanic eruptions, often embedded in a type of igneous rock called kimberlite, but their formation environment is fundamentally metamorphic.

• Emeralds: These precious green beryl gemstones typically form in metamorphic rocks like schist and sometimes in hydrothermal veins associated with metamorphic processes.

• Other Examples: Other gemstones commonly associated with metamorphic rocks include ruby, sapphire, garnet, jade, and aquamarine.