Properties of minerals are usually used by the mineralogist to identify or determine the identity of a mineral (specimen).
Magnetism: is the property of the mineral that attract or repel other magnetic materials.
Luster: is the property of minerals that shows how the surface of the minerals reflect s light and it is usually affected by the brilliance of the light that is used to observe the mineral surface.
Streak: usually shows the true color of minerals and used to be in powered form.
<span>The whole brain is not gray matter, just the surface of it and parts of the interior, and there is other gray matter in nerve tissue along the spinal column. </span>
