A mother load belt is commonly an accumulation of veins. (True or false?)

A mother load belt is commonly an accumulation of veins. Indicate whether the statement is true or false.

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Q. 2 - About 70 of diamonds used as abrasives are artificial. Indicate whether the statement is true or false.

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Q. 3 - Pegmatites can contain extremely large crystals. Indicate whether the statement is true or false.

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Q. 4 -

Hydrothermal deposits come from the action of hot mineral-rich fluids that come from cooling magma
  bodies. Indicate whether the statement is true or false.

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Q. 5 - Black smokers are a type of volcanic eruption. Indicate whether the statement is true or false.

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Q. 6 - A placer is a mining marker used to indicate a claim. Indicate whether the statement is true or false.

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Q. 7 - Bauxite forms as the result of intense weathering in tropical areas. Indicate whether the statement is true or false.