1 response

  1. Ivan S.
    April 13, 2016

    Hi there,

    Certain point that I can not agree with:

    1/ Crystals are basically forms of minerals that have the elements, atoms, molecules and ions in a structured pattern.

    Well, not really, because ALL minerals have crystalline structure. If we are to divide minerals from crystals then crystals may be referred to those minerals who are characterized by external planar faces. Also minerals are naturally formed substances which does not apply to all crystals.

    2/ These two crystals are known as dark crystals because the light defines the formations of these crystals. Indeed, the light has a great impact on how these minerals are created.

    Could you please elaborate on what exactly you mean by this? Usually what defines the formation of a crystal are factors like temperature, pressure of the environment, chemical composition of the initial magma or other fluid. Light defines the COLOR of a mineral because of its different bending (refraction index) in the mineral structure and thus a different amount of light is being absorbed.

    Regards

    Reply

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