metamorphic
Planet Earth
Gaia (Silicate Terrestrial Planet)
Hardness: Variable (Surface crust 5-7 Mohs); Color: Blue, White, Green, Brown; Luster: Pearly to Dull; Structure: Spherical geoid; Specific Gravity: 5.51 g/cm3
- Hardness
- Variable (Surface crust 5-7 Mohs)
- Color
- Blue, White, Green, Brown
- Luster
- Pearly to Dull
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Physical properties
Hardness: Variable (Surface crust 5-7 Mohs); Color: Blue, White, Green, Brown; Luster: Pearly to Dull; Structure: Spherical geoid; Specific Gravity: 5.51 g/cm3
Formation & geological history
Accreting from the solar nebula approximately 4.54 billion years ago. It underwent planetary differentiation to form a core, mantle, and crust.
Uses & applications
Supports all known life; source of all natural resources, minerals, and industrial materials.
Geological facts
The image is known as 'The Blue Marble', originally taken by the Apollo 17 crew. It is the only known planet with liquid water on its surface.
Field identification & locations
Identified by its unique atmosphere and liquid oceans. It can be found in the inner Solar System, third from the Sun. For collectors, it contains every known mineral species.
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