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Technically, not all minerals form in the earth. Minerals can also form inside hollow rocks as geodes, or they can form on the surface through evaporation of solutions ( mixture of one substance dissolved in another.)
I think you are describing a geode. They are generaly hollow and crystalline in structure
They are called geodes.
They're geodes.
Geodes. They can be found in some igneous rocks as well. They start as a hollow cavity created by a gas bubble or decaying organism. Mineral rich water seeps into the cavity and crystals form from the outside toward the inside.
Rocks composed of evaporite minerals, such as halite and gypsum, are rocks formed by evaporation of fluids.
White rocks reflect the thermal radiation from the Sun.
yes there are some rocks that are round called geodes these rocks are hollow on the inside and have crystals inside them
metamorphic
By precipitation or evaporation of saturated solutions.
By precipitation or evaporation of saturated solutions.
Technically, not all minerals form in the earth. Minerals can also form inside hollow rocks as geodes, or they can form on the surface through evaporation of solutions ( mixture of one substance dissolved in another.)
geodes
Rose rocks are actually crystals of barite formed from evaporation of fluid in sandstone formations.
evaporation and precipitation.
geodes
I don't know. Ask your science teacher.